Year	annual %
1961	1.9710108842553804
1962	1.9815863651152392
1963	2.162381720095594
1964	2.3122417420854213
1965	2.3818312967854425
1966	2.4346780528292915
1967	2.456454436098203
1968	2.416142291994973
1969	2.2452206854050476
1970	1.771609633191767
1971	1.4804584426407827
1972	1.2695708017566534
1973	1.133521305295856
1974	1.0497805856715594
1975	1.3670364855178756
1976	1.7042776677858558
1977	1.6948677088411719
1978	1.6796562435079803
1979	1.7401981156504684
1980	1.9773321856041197
1981	2.0839697731049864
1982	2.0307120524955606
1983	1.9719116897116968
1984	1.9312021233342098
1985	1.9059859770993226
1986	1.8765376927880002
1987	1.8444064841747536
1988	1.8205682081499912
1989	1.7938869675352984
1990	1.756503841185665
1991	1.6887500319393944
1992	1.5881478453567355
1993	1.567716753932048
1994	1.70791550072899
1995	2.1023465124578444
1996	2.584279687174079
1997	2.9516252085541677
1998	3.0681849898687488
1999	2.957991780703518
2000	2.840022864079068
2001	3.1121440056953347
2002	3.0922906692003886
2003	3.043810948903879
2004	2.9960565871691673
2005	2.9474741734931085
2006	2.899023555467654
2007	2.844843993168278
2008	2.782048904321511
2009	2.7053343274915114
2010	2.45644306384036
2011	2.280869086962991
2012	2.2969084620568516
2013	2.31775706385302
2014	2.3109640172644488
2015	2.272839176351275
2016	2.2426752004562003
2017	2.2221624314143775
2018	2.2179402054877055
2019	2.1328372918304668
2020	1.8322445591003762
2021	1.6673418068286414
2022	1.7229967505721773
2023	1.8166172401559588