Year	years
1960	69.4850487804878
1961	69.57236585365855
1962	69.33458536585366
1963	69.78748780487805
1964	70.20551219512195
1965	69.86839024390245
1966	69.7309512195122
1967	69.56153658536587
1968	69.55478048780488
1969	68.97560975609757
1970	68.8089756097561
1971	69.03775609756099
1972	68.91729268292686
1973	69.04309756097561
1974	68.9340243902439
1975	69.04631707317074
1976	69.04285365853659
1977	68.81856097560977
1978	68.7599756097561
1979	68.46968292682928
1980	68.33017073170733
1981	68.59819512195124
1982	68.87568292682928
1983	68.84639024390246
1984	68.50580487804879
1985	68.61312195121953
1986	70.06629268292683
1987	70.49512195121952
1988	70.49756097560977
1989	70.51951219512196
1990	70.09756097560975
1991	69.29804878048782
1992	68.7709756097561
1993	68.13073170731708
1994	67.54121951219513
1995	66.74195121951222
1996	67.02243902439025
1997	67.57634146341464
1998	68.37487804878049
1999	67.9809756097561
2000	67.67560975609757
2001	67.83707317073171
2002	68.27560975609757
2003	68.21073170731708
2004	68.18536585365854
2005	67.95682926829268
2006	68.07756097560977
2007	68.22219512195123
2008	68.25146341463416
2009	69.19
2010	70.26536585365855
2011	70.80926829268293
2012	70.94414634146342
2013	71.15951219512196
2014	71.18658536585367
2015	71.18951219512196
2016	71.47634146341464
2017	71.78097560975611
2018	71.58268292682928
2019	71.82731707317075
2020	71.18512195121953
2021	69.6478048780488
2022	68.5879268292683