Year	annual %
1961	4.502247272490513
1962	3.1054968266651524
1963	3.114571977892503
1964	3.1637462682566717
1965	3.2002091951882354
1966	3.2343631782413897
1967	3.2478483228304045
1968	3.296143836843879
1969	3.2921802236345132
1970	3.322607116300909
1971	3.395924544284294
1972	6.854166599038562
1973	6.827549361702699
1974	6.838732904447207
1975	6.834273204078147
1976	6.839719760038464
1977	6.873606440847772
1978	6.924016288275628
1979	6.949711494201736
1980	6.966940769712099
1981	6.912833928126904
1982	6.030325261679666
1983	6.058774513634569
1984	6.042602874453013
1985	5.954621910362255
1986	5.877063189172463
1987	5.787530060327476
1988	5.764076244861916
1989	5.853380685161027
1990	6.031847464770848
1991	6.203524373379411
1992	7.08454773363073
1993	6.95355542439466
1994	6.698441941174098
1995	6.539542940149283
1996	6.323644600675278
1997	6.198206552114298
1998	6.088063577290244
1999	5.9752060460975445
2000	5.823998660469238
2001	5.625200602476321
2002	3.5748823752544685
2003	3.4461268653779236
2004	3.3050952685761033
2005	3.129453167171106
2006	2.930862886051398
2007	2.773587507283888
2008	2.658824808518062
2009	2.561661836318202
2010	2.508896822215874
2011	2.3926024938212587
2012	2.260705475166335
2013	2.210192402109384
2014	2.332875603702882
2015	2.5797709475940853
2016	2.9579372931451466
2017	3.2086427679253284
2018	3.2083939480064547
2019	3.2069647608971352
2020	3.8514772570941624
2021	4.3895210502417985
2022	3.7790431430393885
2023	3.2212746118838944