Year	Number
1961	12000
1962	12000
1963	12000
1964	25000
1965	29000
1966	33950
1967	39800
1968	46000
1969	54550
1970	71500
1971	71240
1972	165000
1973	180860
1974	193190
1975	171160
1976	154000
1977	164610
1978	160960
1979	160820
1980	159610
1981	164180
1982	158960
1983	180100
1984	179910
1985	214480
1986	223500
1987	266200
1988	265154
1989	265128
1990	265184
1991	288103
1992	292148
1993	564520
1994	883250
1995	829671
1996	498732
1997	570367
1998	543881
1999	622203
2000	680862
2001	646899
2002	689373
2003	649770
2004	602088
2005	548824
2006	485295
2007	435630
2008	321908
2009	118731
2010	109286
2011	131243
2012	101021
2013	102099
2014	88492
2015	211845
2016	281498
2017	308528
2018	278322
2019	242171
2020	234645
2021	207101
2022	206229
2023	188953