Year	Number
1972	2622
1977	1625
1978	1479
1979	1328
1980	1608
1981	1946
1982	2405
1983	2307
1984	1783
1999	97
2002	537
2004	225
2005	1091
2007	388
2008	146
2011	138.121994018555
2013	76.0550003051758
2014	136
2015	149
2016	266
2018	1184
2021	3083