Year	Percent
1950	18.90228
1955	17.24736
1960	14.29836
1965	12.21414
1970	12.93968
1975	13.28574
1980	14.39521
1985	13.10355
1990	11.95422
1995	12.51893
2000	14.20477
2005	16.71154
2010	18.71535
2015	19.33331
2020	19.94625
2025	20.90769
2030	22.78985
2035	24.53861
2040	24.29165
2045	23.82489
2050	23.06213
2055	24.12662
2060	26.01533
2065	27.19658
2070	27.54581
2075	26.47975
2080	26.01145
2085	26.3007
2090	26.91206
2095	27.20722
2100	26.92981