Year	Percent
1950	14.03113
1955	12.38418
1960	15.41319
1965	14.94253
1970	14.99253
1975	15.105
1980	12.87144
1985	11.60362
1990	11.48129
1995	12.41008
2000	10.24749
2005	9.28847
2010	8.45829
2015	7.75901
2020	7.54925
2025	7.10581
2030	6.5918
2035	6.24887
2040	5.94649
2045	5.69134
2050	5.49686
2055	5.33156
2060	5.17853
2065	5.03466
2070	4.92168
2075	4.83684
2080	4.77479
2085	4.72086
2090	4.67513
2095	4.6269
2100	4.59166