Lesotho 2006 Census Data
4th Africa Symposium on
Statistical Development, 09 –
13 February, 2009, Luanda,
Friday, May 04, 2012
‘Matsotang Tsietsi 1
Objectives of This Presentation
• Sharing Lesotho’s experience in processing
data for the 2006 census.
• For Africa to decide on the proper methods to be
adopted on processing of the census data. That
is choosing between the manual data
processing and the use of the modern
Friday, May 04, 2012 2
The Outline of the Presentation
• This presentation is divided into five sections
1) Background information
2) Methods of processing the Lesotho 2006
4) Where we are now
Friday, May 04, 2012 3
• Lesotho conducted Population and Housing
Census on the 13th April 2006.
• The enumeration covered the whole country, the
ten districts, 80 constituencies, 120 community
councils, 4 agro -ecological zones and the urban
and rural areas.
• The constituencies were also divided into
enumeration areas, and those were 4,250 and
the same figure represented the number of the
Friday, May 04, 2012 4
Background Information Con..
• After data collection for census had been
completed, and all the census materials had
been retrieved from the field, manual
compilation of data for the production of the
census preliminary results commenced.
• Although this process was hindered by different
post census activities, the process was
completed in July 2007.
Friday, May 04, 2012 5
Methods of Data Processing
• There were two methods Lesotho had to choose from
when entering the 2006 census data, that is the
scanning and the manual data entry.
• The use of scanning method was the first choice as
Lesotho had used it successfully, with minimal problems,
for processing data for the 2002 Core Welfare Indicator
Questionnaire Survey (CWIQ), for which we got funding
and technical assistant from the World Bank. We also
used the scanner during the 2006 census Pilot.
• During CWIQ survey, the questionnaires were retrieved
from the field and scanned as soon as they reach the
headquarters. Hence this reduced the problem of
Friday, May 04, 2012 6
Methods of Data Processing…
• CWIQ however was a sample survey and had covered
only 6,780 households, as such it was manageable data.
• During the main census data entry, the questionnaires
were not as clean as they were handled by many hands,
eg. While preparing for the release of the census
preliminary results, extracting the population 17 years
and above for the Independent Electoral Commission
(IEC) and during the editing and coding exercise.
• Two scanners were purchased from the Republic of
South Africa (RSA), and processing of the census data
commenced in September 2006 after the release of the
census preliminary results.
Friday, May 04, 2012 7
Methods of Data Processing (Cont.)
• The two softwares of CSpro and Teleform were used
during the scanning exercise, and four of our IT
personnel were trained for these softwares in RSA.
• For the questionnaires which were not visible for the
scanner, because of its sensitivity, or were band at the
corners during packaging, the manual data entry
method was adopted.
• In February 2008,realising the problems encountered
with the scanning method, the BOS resorted to the
manual data entry in march, and this activity was
completed in July 2008.
• At that time three of the ten districts had been
completely scanned, while two were partially scanned.
Friday, May 04, 2012 8
• Scanning of the census data was chosen by Lesotho
because it was known to be faster than the manual
data entry, as such, it speeds up the process of
releasing the census results.
• It took Lesotho five years to release the 1976 and
1986 census results. However, the results of the 1996
census were released within two years.
• Since the scanners were bought from RSA, it follows
that its maintenance also was not within the country.
• Thus, they took much time to get back to us. In the
Meantime the processing of data was not in progress.
Friday, May 04, 2012 9
• The methods of purchasing the consumables took a
long time because of the bureaucratic procedures,
and they could only be bought from RSA.
• At the beginning of the data entry, the data
processing activity was not treated like a project
activity ,whereby the data processing staff worked
within the normal working hours, and yet they were
also responsible for support.
Friday, May 04, 2012 10
Where we are now
• In August 2008, data cleaning commenced, and
it had engaged an international consultant from
UNFPA. However, this activity continued until
the first week of January 2009 when the first set
of census tables was produced.
• The census data analyses team (CDAT) was
invited during the second week of January 2008
to review the census tables, and the following
problems were discovered:
Friday, May 04, 2012 11
Where we are now (Cont)
• There were some inconsistencies among the
tables, whereby the figures for most topics did
• The census data was collected from the
constituencies within the districts, and there are
some constituencies which overlap. It was
realized that this had created a lot of problems
with this structure, and to relocate the population
of the two districts was a big problem.
• It was also discovered that during scanning of
the data, some figures had shifted.
Friday, May 04, 2012 12
• Poor Questionnaire handling by Enumerators
resulted in the delay in scanning exercise
• Frequent handling of questionnaires for different
purposes before scanning was also a problem
(extraction of 17+ yrs population for IEC,
preparation for the production of the of total
population for the preliminary results)
• Faint bubbles of responses resulted in some of
the response bubbles being too faint to be
picked by the scanner hence required a lot of
Friday, May 04, 2012 13
• Printing errors, some of the pages of the
questionnaires were twisted during printing and
some responses could not be picked up by the
• Unavailability of consumables in the local market
hampered the scanning process, because all
consumables had to be ordered from RSA and
it usually took more than two weeks to be
• Electric Power Load shading was also a problem
in Lesotho during the months of April to July
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That’s the End
Khotso Pula Nala