Year	annual %
1961	1.0794819136079334
1962	0.8479313476787398
1963	0.7315321576372915
1964	0.8346990941150123
1965	0.863625374939626
1966	0.7140337370209671
1967	0.8501645255320468
1968	0.8080142327960192
1969	0.5930594741638119
1970	0.6932436775644896
1971	2.0851892060996864
1972	3.425106208281107
1973	3.6274238603835234
1974	3.682916618860123
1975	3.9325889586845353
1976	4.036615006051449
1977	3.9339414560032293
1978	3.9407452579703914
1979	3.8162860495327413
1980	4.705316445842963
1981	8.3353030297773
1982	8.441525508614566
1983	8.081690525645174
1984	7.7696833332106126
1985	7.416934556800559
1986	7.053415424536437
1987	6.769339060038392
1988	6.483378049031928
1989	6.137514836899231
1990	6.416332827255398
1991	6.751370031936838
1992	6.927201216492859
1993	6.609651933159307
1994	6.340663255172505
1995	6.053659752167269
1996	5.8096940422212935
1997	5.56459093139864
1998	5.41139207822744
1999	5.299750125045305
2000	5.146600251788302
2001	5.308371485801483
2002	5.83411618066871
2003	6.087693747794401
2004	5.733248928586649
2005	5.44129530043708
2006	5.223566393496387
2007	5.019951696931052
2008	4.857577891831612
2009	4.67149132168307
2010	4.436872389764248
2011	4.087419106261887
2012	4.489671662811263
2013	5.0380925391707185
2014	4.457766377250783
2015	4.71676611550509
2016	4.917741978983148
2017	4.417156721876869
2018	4.344253713032654
2019	4.046567586817582
2020	3.00277262601928
2021	2.117605418798848
2022	1.5238122171536137
2023	0.9954477180754272