Year	Number
1979	56.72627485189
1980	5.284761595012218
1981	9.223025114990403
1982	6.484256617688997
1983	17.791126464860298
1984	3.539508448431382
1985	1.777939360677792
1986	2.8369359639908134
1987	0.4945310446455647
2004	0.18341024591606817
2005	0.23127226617747373
2006	0.4589241211900509
2007	0.7443752796468552
2008	0.8353971213011805
2009	2.4158770310312674
2010	2.641188125778314
2011	2.3070690176128794
2012	2.477583891541423
2013	2.919542029353743
2014	2.48325765683866
2015	3.7957588545189487
2016	4.331653278253021
2017	4.727281025627733
2018	2.875377157301337
2019	2.5979142281695675
2020	2.7436183444980373
2021	4.502290872120515
2022	3.4367359561298354