Year	annual %
1971	20.0522312040536
1972	77.7957404755204
1973	352.810986573029
1974	504.738541215978
1975	374.735274232635
1976	211.924302225904
1977	91.9541325565106
1978	40.0872246313854
1979	33.3892190102251
1980	35.1383405330485
1981	19.6868327084319
1982	9.94102693041838
1983	27.2571946726203
1984	19.8602056602627
1985	30.7034989096151
1986	19.4768379232583
1987	19.8808457201904
1988	14.684351250082
1989	17.0279367308961
1990	26.0364811362365
1991	21.7844124277756
1992	15.4258064688928
1993	12.7277669490964
1994	11.4431196444973
1995	8.23263034116105
1996	7.35911781788776
1997	6.13386464357926
1998	5.11024954517559
1999	3.33687917526016
2000	3.84327295706575
2001	3.56910053001458
2002	2.48939816650708
2003	2.81017875743615
2004	1.05473871403513
2005	3.05257621387847
2006	3.39201733699409
2007	4.40779938398042
2008	8.71626873039613
2009	0.353045178360957
2010	1.41071107954317
2011	3.34121694259301
2012	3.00744840213047
2013	1.7895555398459
2014	4.71867527854663
2015	4.34877353217053
2016	3.78619355893118
2017	2.18271846868519
2018	2.43488981353057
2019	2.55754475703327
2020	3.04549084804334
2021	4.52456838259121
2022	11.6438667110561
2023	7.58168251407969