Year	Percent
1950	9.55995
1955	10.32553
1960	11.14073
1965	12.06393
1970	12.96398
1975	14.07471
1980	13.21255
1985	14.34849
1990	17.62438
1995	19.51751
2000	21.66491
2005	22.30913
2010	24.29444
2015	27.05303
2020	29.1258
2025	29.33809
2030	31.72497
2035	33.86696
2040	36.13247
2045	36.87948
2050	38.44624
2055	38.58732
2060	38.45896
2065	38.19922
2070	38.20437
2075	38.00779
2080	37.88886
2085	37.85504
2090	37.86342
2095	37.96259
2100	38.16833