Year	Percent
1950	14.25185
1955	13.84806
1960	13.53843
1965	13.45686
1970	13.58719
1975	13.4288
1980	13.27873
1985	13.49137
1990	13.47663
1995	14.0155
2000	14.53871
2005	14.9613
2010	15.7003
2015	16.54992
2020	17.82444
2025	19.24787
2030	20.58412
2035	21.81937
2040	22.89367
2045	23.71627
2050	24.29138
2055	24.55811
2060	24.7206
2065	24.88998
2070	25.09714
2075	25.31529
2080	25.3534
2085	25.25858
2090	25.08819
2095	24.89087
2100	24.68411