Year	annual %
1961	9.655510797313186
1962	9.596879255024378
1963	9.582359769054746
1964	9.82567596099112
1965	10.321978325169551
1966	10.918345365964479
1967	11.35242119820173
1968	11.439532889648179
1969	11.139735506962673
1970	9.276958528029265
1971	4.630195531026017
1972	4.264366514669247
1973	4.03958422941742
1974	3.9400006803987635
1975	3.870781208190291
1976	3.8372986488696004
1977	3.8077556541442203
1978	3.817260968486342
1979	3.9378055217039876
1980	4.19573416172195
1981	4.482270716190938
1982	4.74928351368724
1983	4.87208723906258
1984	4.827341874629453
1985	4.6653869427363714
1986	4.52363508249918
1987	4.503039624840109
1988	4.487548993803803
1989	4.431332294972464
1990	4.39499619260736
1991	4.350185513676898
1992	4.303389254243633
1993	0.7472908196464314
1994	1.76851939243833
1995	5.877184993917448
1996	5.2162600102274626
1997	4.63931397331452
1998	4.29681110860934
1999	4.287868063682395
2000	4.2049137134671035
2001	4.061668143540788
2002	3.9598622127871854
2003	3.9460633485375674
2004	3.9562179781631888
2005	3.9151229966746346
2006	4.1179549548597585
2007	4.208897717429689
2008	4.14747834290649
2009	4.0705551921119545
2010	3.9449360388653814
2011	3.975713476393267
2012	3.945288006307786
2013	3.8869649831676205
2014	3.8484137387358723
2015	3.8123211506321044
2016	3.794268623258807
2017	3.773862644483455
2018	3.742365400922134
2019	3.712414669887633
2020	3.6893312378901353
2021	3.662659531189444
2022	3.6210405007807047
2023	3.5785864395125544