Year	Number
1981	1
1983	1
1984	2
1985	297
1988	889
1990	1324
1991	1491
1992	1560
1994	5360
1995	5290
1999	4684
2001	4370
2002	4046
2005	1859
2007	1752
2008	1684
2014	1450
2015	1473
2016	1078
2017	1327
2018	716
2019	872
2020	809
2021	667