Year	Percent
1950	12.01753
1955	11.93831
1960	11.92326
1965	11.9587
1970	12.62223
1975	12.21864
1980	12.01916
1985	12.34359
1990	12.66623
1995	13.11558
2000	13.56187
2005	14.67116
2010	15.66263
2015	16.32937
2020	17.29538
2025	18.34133
2030	19.81219
2035	20.44911
2040	21.3009
2045	21.46159
2050	22.00391
2055	22.75553
2060	23.17438
2065	23.68054
2070	23.66414
2075	23.81791
2080	23.95628
2085	24.10662
2090	24.23323
2095	24.28502
2100	24.27061