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- Title "New Cases of AIDS in The United States";
- Variable Year; // Year for new cases
- Variable Newcases; // Total new cases during year
- Variable Childcases; // New cases for children under 13
- Parameter k1=50000; // Initial estimate of max cases
- Parameter a=5;
- Parameter b=-.8;
- constant baseyear=1980;
- Function newcases = k1 / (1+exp(a+b*(year-baseyear)));
- Plot Domain=1980,1995;
- Data;
- 1981 188 0
- 1982 500 13
- 1983 1500 22
- 1984 3000 50
- 1985 7000 120
- 1986 12000 200
- 1987 21000 350
- 1988 31500 590
- 1989 34000 620
- 1990 42000 770
- 1991 45500 700
- 1992 46106 771
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