Year	Percent
1950	15.97188
1955	15.26221
1960	14.30091
1965	13.35697
1970	12.47084
1975	11.69946
1980	10.69861
1985	9.66397
1990	9.39406
1995	9.70957
2000	9.92202
2005	10.20623
2010	10.77679
2015	11.9746
2020	13.63853
2025	15.46975
2030	17.03726
2035	17.90103
2040	18.81922
2045	19.74408
2050	20.82193
2055	21.84089
2060	22.53869
2065	23.04833
2070	23.42354
2075	23.9332
2080	24.3848
2085	24.72464
2090	24.94894
2095	25.08078
2100	25.16284