Year	Percent
1950	12.44286
1955	9.22286
1960	11.09766
1965	11.265
1970	10.99879
1975	10.91305
1980	9.4975
1985	8.83413
1990	7.84214
1995	7.24547
2000	7.28372
2005	6.48036
2010	5.99882
2015	4.76284
2020	4.69711
2025	4.46647
2030	4.52443
2035	4.67099
2040	4.62037
2045	4.39259
2050	4.21617
2055	4.20484
2060	4.32035
2065	4.47439
2070	4.55536
2075	4.52298
2080	4.45763
2085	4.45358
2090	4.53126
2095	4.63569
2100	4.69286