Year	Percent
1950	11.27727
1955	11.57918
1960	13.89064
1965	14.28241
1970	14.47403
1975	14.70061
1980	14.93517
1985	15.16283
1990	14.851
1995	14.71558
2000	14.89759
2005	15.13135
2010	14.60458
2015	13.99141
2020	13.3567
2025	13.06938
2030	12.7405
2035	12.27618
2040	11.72613
2045	11.20853
2050	10.76656
2055	10.36499
2060	9.97302
2065	9.5627
2070	9.16651
2075	8.79765
2080	8.43563
2085	8.10544
2090	7.78043
2095	7.46186
2100	7.16901