Year	Number
1960	6.21429795622125
1961	11.186780335253832
1962	3.5261753991307296
1963	20.503401583403935
1964	51.18661986142747
1965	5.014290516257578
1966	5.503512921368568
1967	15.187665449576459
1968	6.209502194457488
1969	7.998712529680297
1970	5.7000116194996675
1971	5.111784915515729
1972	6.213086033629986
1973	10.609368891368561
1974	4.456442967016917
1975	9.899943093695066
1976	11.67593997779467
1977	9.78969427177195
1978	14.486020095653767
1979	4.4127416563930275
1980	3.1490804011697793
1981	2.6667896023891453
1982	8.430471381025653
1983	25.826090625453396
1984	37.538577664907706
1985	43.83700030691911
1986	34.21963302639155
1987	53.146463733107275
1988	48.5220095698009
1989	40.97430239823742
1990	58.849602227025834
1991	63.384274056046465
1992	82.85038223739748
1993	77.18857444895004
1994	5.251408109217753
1995	5.0139602161232215
1996	3.7856663006992806
1997	5.472259617329051
1998	73.74826271883327
1999	8.045810034100418
2000	2.0913547462381636
2001	4.4858406098238035
2002	10.838349554948598
2003	11.449151439810146
2004	4.786685338333514
2005	1.0843906420711356
2006	0.6425045646464049
2007	0.6918326493310654
2008	0.5553798675797622
2009	0.5634666362021492
2010	0.6048577146598263
2011	0.6910323589101248
2012	0.777121625565018
2013	0.8589419462752839
2014	1.041106400500745
2015	1.706093656409773
2016	4.497482972824411
2017	7.631790659486384
2018	6.726326698128313
2019	3.1157905798422054
2020	3.136309927860271
2021	4.80948025057125
2022	4.618268679146117
2023	6.082267168632156