Year	Number of
1980	2710
1981	2425
1982	2179
1983	2065
1984	2143
1985	1952
1986	1760
1987	1616
1988	1666
1989	1617
1990	1591
1991	1841
1992	1778
1993	1830
1994	1677
1995	1889
1996	1951
1997	1977
1998	2120
1999	1805
2000	1728
2001	1536
2002	1516
2003	1581
2004	1414
2005	1356
2006	1313
2007	1359