Year	Percent
1950	14.31059
1955	14.98447
1960	13.10884
1965	13.52252
1970	14.0309
1975	14.4949
1980	14.75053
1985	15.04097
1990	14.18715
1995	15.13644
2000	15.18643
2005	15.17956
2010	14.90913
2015	14.9874
2020	13.79283
2025	13.42826
2030	12.95386
2035	12.40335
2040	11.77827
2045	11.1772
2050	10.61681
2055	10.07996
2060	9.59008
2065	9.12181
2070	8.68111
2075	8.26364
2080	7.86785
2085	7.50183
2090	7.16391
2095	6.8423
2100	6.56201