Year	Percent
1950	12.49266
1955	12.09857
1960	13.05499
1965	13.98378
1970	14.1124
1975	12.77643
1980	11.99569
1985	11.19834
1990	10.75688
1995	11.35929
2000	10.48979
2005	9.00415
2010	7.27656
2015	5.44775
2020	5.76846
2025	5.61803
2030	5.55355
2035	5.33288
2040	4.92182
2045	4.53075
2050	4.39073
2055	4.445
2060	4.48496
2065	4.43357
2070	4.30227
2075	4.16991
2080	4.12716
2085	4.19294
2090	4.29232
2095	4.34356
2100	4.31393