Year	Percent
1950	10.56541
1955	11.49315
1960	13.8407
1965	13.99335
1970	13.78717
1975	13.98887
1980	13.77872
1985	13.4398
1990	13.18054
1995	11.86248
2000	10.65147
2005	10.46974
2010	10.73594
2015	9.55347
2020	8.46153
2025	8.03679
2030	7.77859
2035	7.545
2040	7.22846
2045	6.87646
2050	6.54204
2055	6.32018
2060	6.21644
2065	6.16249
2070	6.10231
2075	6.0168
2080	5.93721
2085	5.88329
2090	5.87121
2095	5.87338
2100	5.86456