Year	Percent
1950	15.45288
1955	15.79223
1960	15.78581
1965	15.40854
1970	14.74436
1975	14.01648
1980	13.29017
1985	12.48477
1990	11.70328
1995	11.76414
2000	12.25632
2005	12.90394
2010	13.60883
2015	14.08408
2020	14.711
2025	15.7614
2030	16.97601
2035	18.02103
2040	18.84817
2045	19.4793
2050	20.19204
2055	21.14638
2060	22.05013
2065	22.78789
2070	23.29278
2075	23.62801
2080	24.00229
2085	24.42873
2090	24.85794
2095	25.20701
2100	25.46216