Year	Percent
1950	14.606
1955	15.22139
1960	14.77458
1965	14.26913
1970	14.70013
1975	15.21827
1980	16.23987
1985	17.15589
1990	17.27803
1995	18.34664
2000	22.12191
2005	24.6829
2010	25.55072
2015	26.27452
2020	24.96691
2025	24.29459
2030	25.25458
2035	27.15645
2040	29.37762
2045	29.22264
2050	27.1802
2055	25.01265
2060	22.61148
2065	22.18876
2070	23.03588
2075	22.99077
2080	22.50394
2085	21.74259
2090	21.1688
2095	21.08198
2100	21.37719