Year	Percent
1950	12.42209
1955	14.89354
1960	16.22911
1965	18.90778
1970	18.17186
1975	17.79261
1980	16.4992
1985	15.95806
1990	15.44945
1995	12.51204
2000	9.87393
2005	8.90939
2010	10.53819
2015	12.33661
2020	10.80176
2025	9.36149
2030	8.36385
2035	7.91023
2040	7.90887
2045	8.06552
2050	8.05602
2055	7.65187
2060	7.07191
2065	6.66858
2070	6.52232
2075	6.52637
2080	6.52109
2085	6.38448
2090	6.1378
2095	5.87689
2100	5.71771