Year	Percent
1950	15.90453
1955	16.67385
1960	16.68144
1965	15.97452
1970	15.25013
1975	14.92044
1980	14.83487
1985	14.51313
1990	13.96649
1995	13.98512
2000	14.10809
2005	14.74602
2010	15.62849
2015	16.23951
2020	17.46609
2025	19.42039
2030	21.31671
2035	23.08603
2040	24.32868
2045	24.70293
2050	25.0767
2055	25.37822
2060	25.63371
2065	25.85667
2070	25.90587
2075	25.91403
2080	25.80765
2085	25.66333
2090	25.47071
2095	25.25192
2100	25.00709