Year	annual %
1961	4.696076403617113
1962	4.701320162072676
1963	4.7303475867090725
1964	4.741398595556717
1965	4.810277885750963
1966	4.676005949003198
1967	4.461040243765169
1968	4.483631232305086
1969	4.4507817616531185
1970	4.415614811328837
1971	4.291216369962612
1972	4.273262845914942
1973	4.268654815835333
1974	4.231877970049936
1975	4.369358420378376
1976	4.797685929434664
1977	4.590207687198358
1978	3.823434376427855
1979	3.8572530883818956
1980	4.292460252023275
1981	4.67467564012216
1982	4.610236981216403
1983	4.287157047955972
1984	4.3248885238284345
1985	4.168244850727021
1986	4.119721397953626
1987	3.9091410773993687
1988	3.5680165575878107
1989	3.4565318078576297
1990	3.5414067997444363
1991	3.452677164945598
1992	3.2853866766495514
1993	2.990264031243072
1994	2.861698989329568
1995	2.788714646643271
1996	2.6578920680939433
1997	2.6392393628452453
1998	2.6755417565987187
1999	2.659332178242522
2000	2.6644020728794118
2001	2.6537489044970357
2002	2.4423851900639875
2003	2.400574601481594
2004	2.576791713819887
2005	2.6505115323234065
2006	2.607678429905576
2007	2.5051844898328994
2008	2.4959729687941206
2009	2.5318578844014468
2010	2.5578716827405543
2011	2.2547532571201003
2012	2.2216259498559054
2013	2.538708579569729
2014	2.700848151174924
2015	2.6833531007352036
2016	2.385257597077967
2017	2.208281663604893
2018	2.2231172933019963
2019	2.210338484531718
2020	2.102021792505411
2021	2.011528372700184
2022	1.989685274216086
2023	2.011429260872589