Year	Percent
1978	12
1979	12
1980	12
1981	12
1982	15
1983	20
1984	20
1985	26
1986	26
1987	29
1988	37
1989	50
1990	45
1991	55
1992	55
1993	95
1994	145
1995	125
1996	238
1997	13
1998	22
1999	120
2000	120
2001	140
2002	24
2003	8