ACQUIRED IMMUNODEFICIENCY SYNDROME (AIDS) -- reported cases by quarter, United States, *1989-2000
40,000 35,000 Expansion of surveillance case definition
30,000
25,000
20,000
15,000
10,000
5,000
0
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
Year (Quarter)
*Includes Guam, Puerto Rico, the U.S. Pacific Islands Islands, and the U.S. Virgin Islands.