st: Fitting the logistic curve to a time-series

[Serguei Kaniovski <kaniovsk@wifo.ac.at>]

How can I fit the logistic curve to a time-series "q" so that I can 
control the asymptotes, i.e. I what the fitted curve to level out at the 
value of q=0.04?

year	q
1981	.01102246
1982	.01127048
1983	.01152055
1984	.0118841
1985	.01211535
1986	.01247724
1987	.0129496
1988	.01321121
1989	.01319597
1990	.01362598
1991	.014358
1992	.01417304
1993	.01437101
1994	.01509818
1995	.01539195
1996	.01586584
1997	.01686939
1998	.01767208
1999	.01880662
2000	.01914837
2001	.02034989
2002	.02122596
2003	.02201964
2004	.02243478
2005	.02346839
2006	.02428688

Thank you,
Serguei Kaniovski

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