Year	Percent
1950	18.13422
1955	18.43421
1960	18.5822
1965	19.34866
1970	20.09548
1975	20.60481
1980	20.726
1985	20.88815
1990	20.26311
1995	17.77525
2000	15.48765
2005	14.87686
2010	14.58095
2015	14.03705
2020	13.38074
2025	12.36914
2030	11.40803
2035	10.66669
2040	10.08647
2045	9.51554
2050	8.91096
2055	8.31874
2060	7.80451
2065	7.39586
2070	7.07225
2075	6.79092
2080	6.53433
2085	6.28914
2090	6.08551
2095	5.91975
2100	5.78927