Year	Percent
1950	15.6465
1955	15.62065
1960	15.34072
1965	14.95927
1970	14.48954
1975	13.96343
1980	13.43504
1985	13.03167
1990	12.74929
1995	12.61253
2000	12.5608
2005	12.68142
2010	13.31438
2015	14.16741
2020	15.11395
2025	15.66046
2030	15.6685
2035	15.40211
2040	15.41518
2045	15.99566
2050	17.2147
2055	18.55413
2060	19.40984
2065	19.95495
2070	20.32753
2075	20.76306
2080	21.37538
2085	21.92272
2090	22.302
2095	22.55698
2100	22.78749