Year	Percent
1950	15.81431
1955	15.35279
1960	14.7924
1965	14.03922
1970	13.34309
1975	12.06006
1980	11.67336
1985	10.80959
1990	10.4375
1995	11.66169
2000	11.76686
2005	12.93996
2010	16.26933
2015	18.13843
2020	19.38463
2025	20.73633
2030	22.24123
2035	23.81614
2040	25.54442
2045	26.56033
2050	26.55026
2055	26.26907
2060	25.9781
2065	25.87068
2070	26.13094
2075	26.13248
2080	25.80677
2085	25.35758
2090	24.98896
2095	24.73508
2100	24.53615