Year	Percent
1950	13.53974
1955	14.05321
1960	14.39911
1965	14.80734
1970	15.19243
1975	15.40338
1980	15.64654
1985	15.97989
1990	17.07268
1995	18.53615
2000	21.73673
2005	23.30037
2010	23.88895
2015	24.62727
2020	25.54851
2025	25.84581
2030	25.40643
2035	24.91341
2040	23.84739
2045	23.74071
2050	24.64554
2055	25.16966
2060	25.33343
2065	24.60348
2070	23.44287
2075	22.88861
2080	22.79523
2085	22.89861
2090	22.82684
2095	22.39044
2100	21.78107