Year	Percent
1950	14.20974
1955	14.04445
1960	13.5203
1965	13.04304
1970	12.51085
1975	12.3174
1980	12.31388
1985	12.5701
1990	13.743
1995	15.65096
2000	17.93763
2005	20.48731
2010	22.69962
2015	23.72348
2020	24.77291
2025	25.6914
2030	26.31873
2035	27.31268
2040	27.55185
2045	27.39486
2050	26.95807
2055	26.29451
2060	25.77477
2065	25.07378
2070	24.46739
2075	23.98464
2080	23.58762
2085	23.31586
2090	23.11168
2095	22.95085
2100	22.80844