Year	Years
1980	1.758
1981	5.345
1982	6.792
1983	7.373
1984	8.813
1985	9.115
1986	9.055
1987	9.125
1988	9.161
1989	9.646
1990	9.58
1991	6.717
1992	4.471
1993	4.435
1994	2.275
1995	2.091
1996	1.307
1997	1.23
1998	1.581
1999	1.253
2000	0.9372
2001	0.1799
2002	0.9493
2003	0.377