Year	annual %
1961	2.3782568017272325
1962	2.2998931642742804
1963	2.2695626103467816
1964	2.1712057102590876
1965	2.0613046037963727
1966	1.9917159775635866
1967	1.925869663201226
1968	1.8658928921990992
1969	1.7974484403038247
1970	1.6768963363953873
1971	1.532774150217577
1972	1.128319898503122
1973	0.7641130543150325
1974	0.7130986484501278
1975	0.7060894632215877
1976	0.7168001274633156
1977	0.698575658880813
1978	0.6482514171155316
1979	0.5543267729943011
1980	0.573011316907369
1981	0.6388054701637316
1982	0.621985054234159
1983	0.6059732202703003
1984	0.5826116858898018
1985	0.5607520624379561
1986	0.5109046463090579
1987	0.40640907105047575
1988	0.3870978078652314
1989	0.4147533760924915
1990	0.35469180293858926
1991	0.5349086895779038
1992	0.8388464596732774
1993	0.8791065123690913
1994	0.9141151524265609
1995	1.056228391519312
1996	1.1115271689546233
1997	1.0950790411744578
1998	1.0754760649984973
1999	1.0332051367840194
2000	0.9826707987741372
2001	0.9514988818049517
2002	0.9314522776698908
2003	0.9129963380430439
2004	0.8481762956036789
2005	0.7809369488471702
2006	0.7642925758996029
2007	0.7567313411126975
2008	0.7548355030313019
2009	0.7412009867548477
2010	0.6895609734117016
2011	0.6269412733774402
2012	0.716914370530148
2013	0.8011585475655068
2014	0.8149824813331605
2015	0.8194606631724639
2016	0.7834059488616134
2017	0.7818933753211752
2018	1.3742060317882334
2019	1.0551629014821486
2020	0.5116209235516607
2021	0.7190170579022208
2022	0.5925487427118128
2023	0.657153651808656