Year	Percent
1950	15.73
1955	16.22673
1960	15.56277
1965	14.59881
1970	14.29142
1975	12.83385
1980	13.59128
1985	14.72998
1990	13.05484
1995	15.95919
2000	18.54014
2005	19.77707
2010	25.71672
2015	28.2403
2020	27.60426
2025	26.7616
2030	24.51409
2035	24.06021
2040	25.11226
2045	25.33639
2050	25.17972
2055	24.67566
2060	24.35933
2065	24.22258
2070	24.2308
2075	24.14592
2080	23.85633
2085	23.47807
2090	23.16348
2095	22.98462
2100	22.93444