Year	annual %
1961	0.4338163238567934
1962	0.5330170166985865
1963	0.9157942562043507
1964	1.1111534206868783
1965	1.0682465282357438
1966	0.8331604431670068
1967	0.7108962283365032
1968	0.54420093148408
1969	0.4305412755257214
1970	0.24364566786049519
1971	0.32387420035737785
1972	0.5298217311660361
1973	0.4495206098510268
1974	0.4471944644608807
1975	0.4181868745045324
1976	0.305611529457647
1977	0.3409968968107905
1978	0.30298154432062235
1979	0.29072863614750405
1980	0.3043597067271253
1981	0.15868143273158097
1982	0.0795434344559162
1983	0.09655570686448518
1984	0.10081421807734178
1985	0.1288648859464014
1986	0.13254298398836126
1987	0.1810154989380718
1988	0.4104868588342502
1989	0.454674686469994
1990	0.3864734474319045
1991	0.4587089684666013
1992	0.4896480120300326
1993	0.47346973227463274
1994	0.3888948903035205
1995	0.28903816540397453
1996	0.2718292140602076
1997	0.3173329060609168
1998	0.2877877458439315
1999	0.3003011319482988
2000	0.30843131230723103
2001	0.4026156930844283
2002	0.5048400058189325
2003	0.47518701715664774
2004	0.4882784809004397
2005	0.6044792384012226
2006	0.711907500572579
2007	0.7866514958820785
2008	0.8412395156618023
2009	0.8537914225427777
2010	0.9628096768404544
2011	1.3491174393330272
2012	0.6672414327266186
2013	0.5173691051059092
2014	0.4889119439915808
2015	0.6233859193079083
2016	0.5502232170188714
2017	0.428116624357897
2018	0.49600300346817217
2019	0.581271660540823
2020	0.46974386468413903
2021	0.4503429127041546
2022	0.8928160028286201
2023	1.2003370330810805