Year	Percent
1950	10.9855
1955	11.39749
1960	11.99588
1965	12.9456
1970	13.8725
1975	14.62314
1980	15.21571
1985	15.74026
1990	15.83455
1995	15.40069
2000	14.78556
2005	14.14518
2010	14.1685
2015	14.07543
2020	13.18722
2025	11.99601
2030	11.12841
2035	10.52979
2040	10.09298
2045	9.67159
2050	9.20128
2055	8.6739
2060	8.15704
2065	7.71931
2070	7.36666
2075	7.06908
2080	6.77785
2085	6.49697
2090	6.23162
2095	5.99856
2100	5.81018