Year	Number
1973	246313
1978	284182
1980	294673
1981	296569
1982	294670
1983	283664
1984	274524
1985	265434
1986	260602
1987	249937
1988	244780
1993	296529
2000	350028
2001	308629
2002	301732
2003	282480
2004	265984
2005	242701
2006	125735
2007	77502
2008	28302
2009	36587
2010	11332
2011	4927
2012	14335
2013	71153
2014	33495
2015	56261
2016	73786
2017	121883
2018	158487
2019	180232
2020	180385
2021	199564
2022	210779