Year	annual %
1961	6.157169476056431
1962	6.072259101604694
1963	5.956048305021482
1964	5.838946412893599
1965	4.489751330553834
1966	4.3301517407822905
1967	4.209174401028749
1968	4.093345292228821
1969	3.951325628102046
1970	3.831928859011561
1971	3.68862279744044
1972	3.578935905597136
1973	3.5264588150949696
1974	3.4249063753275006
1975	3.351009810925211
1976	3.301834359883566
1977	3.3206816497076157
1978	3.3696623902487177
1979	3.3638011166428496
1980	3.374448151619917
1981	3.348519250430831
1982	3.3125756830574122
1983	3.307391433977124
1984	3.269996622191303
1985	3.1667146446930667
1986	2.928812837105634
1987	2.83855909992697
1988	2.817837302569666
1989	2.8017477595120353
1990	2.7855479955969744
1991	2.7093143847071124
1992	2.6470739340179286
1993	2.6210859155601867
1994	2.5860213051491576
1995	2.5208828242825123
1996	2.4444223761346904
1997	2.3899573020384883
1998	2.3327377534880305
1999	2.2634634558736733
2000	2.198864927614093
2001	2.1445136377235707
2002	2.0952811334589274
2003	2.033102900048294
2004	1.9704997624010745
2005	1.8984799880783363
2006	1.8223282820074658
2007	1.752892763556748
2008	1.6717046360449448
2009	1.6264044945868417
2010	1.6116122516320563
2011	1.568316263589828
2012	1.5058010780646962
2013	1.4464196940124667
2014	1.3938936179834962
2015	1.3804941917884512
2016	1.4989563275072453
2017	1.9333318022565855
2018	2.307438448722989
2019	2.233509463086878
2020	1.8651095156142345
2021	1.5299330135867848
2022	1.0700157096443226
2023	0.7760258908472997