Year	Percent
1950	14.02211
1955	14.36482
1960	14.65559
1965	14.83728
1970	15.11192
1975	15.40286
1980	15.55437
1985	15.51717
1990	15.09715
1995	14.40517
2000	14.64556
2005	14.5496
2010	14.60298
2015	14.05199
2020	13.39288
2025	12.80435
2030	12.35625
2035	11.98987
2040	11.59021
2045	11.1245
2050	10.64144
2055	10.20385
2060	9.83082
2065	9.51037
2070	9.21998
2075	8.91508
2080	8.60171
2085	8.30143
2090	8.03429
2095	7.79702
2100	7.54588