Year	annual %
1961	2.114188749780581
1962	2.1115315596404116
1963	2.137636087163841
1964	2.114249924902282
1965	2.079689806506238
1966	1.9343221161176842
1967	1.8856309554050625
1968	1.8035667699861193
1969	1.7089441977421274
1970	1.581610264300835
1971	1.5383848412521104
1972	1.5861962254558648
1973	1.523597857770227
1974	1.4645119317820274
1975	1.375987903889822
1976	1.3163482152868085
1977	1.298948274657505
1978	1.2939827821563057
1979	1.2263705459892833
1980	1.1642931745569456
1981	1.1752976151660164
1982	1.0629801703531143
1983	1.0107553781103462
1984	1.0146614816955122
1985	1.0058263917543542
1986	1.0137176600086804
1987	1.053728374759615
1988	1.0536546585174165
1989	0.8792113137243547
1990	0.7160169546328632
1991	0.7039850971894026
1992	0.569410428488311
1993	0.49534444676085343
1994	0.41431559938828855
1995	0.35189294145909855
1996	0.34458014261358016
1997	0.3225897871471233
1998	0.30834624606794137
1999	0.30834716615540003
2000	0.30439986395623464
2001	0.35624434871522226
2002	0.4735449518186101
2003	0.5629966904077293
2004	0.6037189988301606
2005	0.6137380108814909
2006	0.6171458662504961
2007	0.6320079457634193
2008	0.7152146485307895
2009	0.6938454381990198
2010	0.6719063945265162
2011	0.49842885474618015
2012	0.6341901299965969
2013	0.69737930723592
2014	0.7081054403626439
2015	0.7156104170458235
2016	0.7103953725567465
2017	0.6558063851886686
2018	0.648309650695623
2019	0.6135892340327871
2020	0.5179238230154084
2021	0.3653322757546533
2022	0.006074075144965718
2023	0.6453622532744987