Year	Percent
1950	10.21509
1955	9.89131
1960	9.53149
1965	9.92279
1970	10.77429
1975	10.85767
1980	10.83394
1985	11.06471
1990	11.04797
1995	11.33814
2000	11.41204
2005	11.29601
2010	11.38069
2015	11.11696
2020	10.56076
2025	9.54997
2030	8.57228
2035	8.24955
2040	7.91523
2045	7.51299
2050	7.05772
2055	6.63705
2060	6.29478
2065	6.02198
2070	5.81951
2075	5.64789
2080	5.50756
2085	5.36187
2090	5.25192
2095	5.16893
2100	5.11484