Year	% of total
1960	56.81818181818181
1961	34.6613545816733
1962	22.49240121580547
1963	121.84873949579833
1964	54.97584541062802
1965	43.33098094565984
1966	65.18987341772153
1967	62.92490118577074
1968	75.77132486388385
1969	78.77934272300469
1970	39.81255093724532
1971	43.07692307692308
1972	43.861209964412815
1973	37.0269215762778
1974	31.667274717256475
1975	30.182926829268293
1976	23.64724844577481
1977	28.043527544774427
1978	36.578947368421055
1979	37.82065336549002
1980	42.563325395107164
1981	38.24091778202677
1982	39.40298507462687
1983	47.413405308142146
1984	44.29109159347553
1985	45.459363957597176
1986	42.69141531322506
1987	44.474675596483884
1988	45.204529697249825
1989	58.973194002726025
1990	76.25072997873848
1991	83.49476923076922
1992	93.19651299245598
1993	88.42557337610265
1994	89.92880952380953
1995	87.5788829787234
1996	99.31228571428571
1997	100.36981118373276
1998	115.15940425531915
1999	128.6675721323012
2000	136.61873259052925
2001	146.2284575502268
2002	154.09640449438203
2003	179.352682767624
2004	186.08245460237944
2005	171.1950228774784
2006	171.4017191719172
2007	180.97400996828276
2008	183.2112298959319
2009	193.75708766716195
2010	185.86275419982317
2011	178.8907761966365
2012	183.5986663652803
2013	180.83327320721511
2014	188.40216240875912
2015	191.9569285042333
2016	207.36754251234234