Year	Percent
1950	12.93216
1955	13.4289
1960	13.60857
1965	10.99925
1970	13.6375
1975	13.84167
1980	13.23912
1985	13.31593
1990	13.31234
1995	16.01936
2000	18.59741
2005	20.16559
2010	23.11425
2015	24.38603
2020	23.60121
2025	27.223
2030	28.22339
2035	28.57764
2040	29.07279
2045	29.99727
2050	32.19021
2055	33.55108
2060	32.81493
2065	31.01765
2070	29.2422
2075	27.44221
2080	25.92201
2085	25.05651
2090	24.59876
2095	24.18938
2100	24.10569