Year	Number
1975	250000
1976	280000
1977	330000
1978	360000
1979	390000
1980	410000
1981	470000
1982	480000
1983	490000
1984	510000
1985	530000
1986	550000
1987	570000
1988	584000
1989	600000
1990	620000
1991	643042
1992	652466
1993	694296
1994	667124
1995	704504
1996	739200
1997	740114
1998	742298
1999	731527
2000	734693
2001	721752
2002	701211
2003	653853
2004	650455
2005	731094
2006	657380
2007	644043
2008	592850
2009	561650
2010	532100
2011	516344
2012	476141
2013	423000
2014	400000
2015	356000
2016	362940
2017	342296
2018	266214
2019	235527
2020	211909
2021	192088
2022	173993