Year	Number
1972	68062
1976	74926
1977	80616
1978	92729
1979	101889
1980	106867
1981	111926
1982	117366
1983	111183
1984	106832
1986	108712
1988	135905
1994	219468
1995	242601
1998	294535
1999	315849
2000	330809
2001	347636
2002	325705
2004	215351
2005	137319
2006	171476
2007	135241
2009	188713
2010	229264
2011	181030
2012	166245
2013	197030