Year	Number
1970	1728526
1973	514284
1976	89222
1977	732722
1978	869758
1981	1616301
1983	1635756
1984	2006002
1985	2136775
1986	2248048
1987	2360441
1988	1910651
1989	2003300
1990	1926679
2005	455454
2006	514802
2008	791808
2009	999806
2010	829516