Year	Percent
1950	14.70936
1955	15.71768
1960	14.67123
1965	14.23127
1970	13.71352
1975	12.99274
1980	12.14625
1985	12.58365
1990	13.61363
1995	14.28484
2000	15.93193
2005	19.10221
2010	23.50214
2015	25.76719
2020	27.08951
2025	27.83622
2030	28.12539
2035	29.70261
2040	30.82417
2045	30.37545
2050	29.06917
2055	26.62811
2060	24.54632
2065	23.55471
2070	23.47074
2075	23.21149
2080	22.7672
2085	22.33301
2090	22.03693
2095	21.97039
2100	22.06674