Year	annual %
1961	2.905441752126172
1962	3.337904841343008
1963	3.330304996463281
1964	3.3282279096751766
1965	3.251894320807981
1966	3.168741786378836
1967	3.145867383132189
1968	3.180884213166128
1969	3.2101537212743185
1970	3.217261313158569
1971	3.3792565277870645
1972	3.8646964416746936
1973	3.8717516672934624
1974	3.8815236778261
1975	3.8499086018459234
1976	3.8134004230180354
1977	3.805594882354453
1978	3.802880005131067
1979	3.8061890585928113
1980	3.840865090781679
1981	3.6475155744544407
1982	3.2382079727506308
1983	3.235004534362498
1984	3.237925279500168
1985	3.2182222352737293
1986	3.203949847804646
1987	3.174360580118458
1988	3.146482896972986
1989	3.1301524694833667
1990	3.092929502982423
1991	3.0020431364131706
1992	2.8702991297586684
1993	2.8413248662854445
1994	2.8118850183883835
1995	2.7766922450331406
1996	2.737602927674907
1997	2.7029977876611295
1998	2.668869589518424
1999	2.628230166057256
2000	2.598675552502611
2001	2.7115739194366837
2002	2.9377082549126623
2003	2.87888612843243
2004	2.824628589950517
2005	2.7462519407498167
2006	2.660297137830979
2007	2.599633138319617
2008	2.5528730219941287
2009	2.512308891831391
2010	2.492746289817134
2011	2.4740324310132893
2012	2.470338201649562
2013	2.457264391385156
2014	2.423844627179532
2015	2.394052977198919
2016	2.41309726336112
2017	2.4074751362580042
2018	2.359169974610453
2019	2.3158019847765767
2020	2.263634557072727
2021	2.125468465054995
2022	2.0246712172250088
2023	2.167236891436053