Year	annual %
1961	20.48469387755102
1962	18.46284141435528
1963	50.47363717605005
1964	-15.96389119847963
1965	4
1966	12.748029355803208
1967	12.644648023143684
1968	4.794007490636704
1969	17.635045440620853
1970	12.769097222222223
1971	7.766915556924024
1972	18.664285714285715
1973	23.59597905254921
1974	35.2651828763454
1975	18.76575214229135
1976	24.949978778875888
1977	42.857142857142854
1978	27.489809782608692
1979	30.178776010444142
1980	29.367580843225543
1981	41.99164675916404
1982	41.17089965070221
1983	22.743739295833564
1984	19.565007716049383
1985	64.24259535621614
1986	27.908842356870384
1987	36.4875588777391
1988	32.82505743892718
1989	53.31690647989946
1990	48.751813220971194
1991	67.54988824290605
1992	139.788405149079
1993	103.91974048189614
1994	51.175537040185915
1995	72.68036147905973
1996	65.6174866868252
1997	38.0038979880788
1998	29.93059588489772
1999	23.466761161052652
2000	36.85801418831694
2001	24.514622555747607
2002	30.432735877643314
2003	28.15982806050367
2004	30.165305329067433
2005	43.41737713632693
2006	32.1888104507858
2007	10.768279769383705
2008	16.341662973358364
2009	23.787098763311914
2010	26.27251630283102
2011	17.72009451201858
2012	39.14060272619505
2013	13.073585439373703
2014	16.990136238176962
2015	20.876939079248206
2016	28.258887869659056
2017	68.78463058670258
2018	111.82632680513052
2019	60.078929628333746
2020	87.99138313020343