Year	annual %
1961	2.731855335866811
1962	4.0616499772817605
1963	5.269562790663443
1964	5.139189655530046
1965	2.08253531140015
1966	2.52686556613169
1967	2.5950646830850985
1968	2.7060607511817807
1969	2.8515992327684785
1970	2.8888713445105054
1971	2.880688731264854
1972	2.770197161848344
1973	3.0916356059647256
1974	3.3118396021403385
1975	2.2463656833545684
1976	2.604343845469657
1977	2.491824653038279
1978	3.6973616904546276
1979	4.886201022712797
1980	4.886768413586665
1981	4.942247269526163
1982	5.025749708501891
1983	4.459764101331913
1984	4.358602572898079
1985	4.348823115594229
1986	4.396216038354694
1987	4.442841080170965
1988	4.417887733110518
1989	4.332898690140553
1990	4.263102140024472
1991	4.344739830939147
1992	4.248385726726539
1993	4.154367053522009
1994	4.0984642081719045
1995	4.0161151828822454
1996	3.9538722939053628
1997	3.8875626405132806
1998	3.795481566497628
1999	3.669855084799181
2000	3.593373381556276
2001	3.78153928125964
2002	3.8669573765574228
2003	3.770917741288173
2004	3.6838802110646043
2005	3.6025604859958946
2006	3.445933762760191
2007	3.3235773102701813
2008	3.259149119937703
2009	3.183041991852221
2010	3.1129112620607913
2011	2.965336933422819
2012	2.958994608802996
2013	2.8866739212548396
2014	2.8028034706468787
2015	2.7118365541246305
2016	2.655917098546894
2017	2.615632648699446
2018	2.426511415580862
2019	2.257282250591203
2020	2.085109380267383
2021	1.8767839923143868
2022	1.722076021179305
2023	1.6059762534524964