Year,F
1985,0.89
1986,0.87
1987,1.07
1988,1.32
1989,1.06
1990,0.95
1991,0.51
1992,0.41
1993,0.28
1994,0.48
1995,0.65
1996,0.57
1997,0.73
1998,0.63
1999,0.44
2000,0.82
2001,1.00
2002,0.79
2003,1.07
2004,0.75