1986 4595 7364  -28.44
1987 4827 7547  -92.83
1988 4427 7099 -114.30
1989 4258 6894 -139.09
1990 3995 6572 -180.65
1991 4330 7156   46.13
1992 4265 7232  191.44
1993 4351 7450  317.74