Year	Percent
1950	14.49199
1955	15.57812
1960	16.58547
1965	16.27159
1970	14.4898
1975	13.47292
1980	12.55464
1985	12.0403
1990	11.91031
1995	11.25295
2000	9.15204
2005	7.34679
2010	6.16221
2015	6.02276
2020	5.8627
2025	5.75737
2030	5.4778
2035	5.00816
2040	4.57342
2045	4.39889
2050	4.42067
2055	4.42825
2060	4.3431
2065	4.18158
2070	4.0265
2075	3.97002
2080	4.02889
2085	4.13026
2090	4.19259
2095	4.17943
2100	4.12317