Year	Number
1975	120000
1976	130000
1977	160000
1978	170000
1979	190000
1980	200000
1981	230000
1982	240000
1983	250000
1984	260000
1985	270000
1986	280000
1987	290000
1988	298000
1989	310000
1990	320000
1991	332007
1992	339370
1993	349720
1994	377884
1995	411678
1996	438811
1997	468593
1998	498556
1999	515486
2000	522816
2001	506292
2002	475000
2003	461000
2004	444031
2005	442045
2006	451912
2007	495492
2008	498129
2009	492759
2010	482211
2011	471908
2012	448212
2013	426490
2014	407289
2015	387607
2016	370589
2017	362117
2018	345690
2019	324388
2020	304728
2021	296620
2022	265944