Year	Percent
1950	18.76098
1955	19.09734
1960	18.95399
1965	18.61406
1970	17.84728
1975	17.42315
1980	17.20954
1985	16.84043
1990	16.10272
1995	15.43128
2000	15.19167
2005	14.01887
2010	14.07083
2015	12.85338
2020	12.14768
2025	11.43065
2030	10.81953
2035	10.31251
2040	9.80784
2045	9.3308
2050	8.86976
2055	8.41404
2060	8.00514
2065	7.62781
2070	7.29417
2075	6.97321
2080	6.67544
2085	6.403
2090	6.16255
2095	5.94317
2100	5.74868