Year	Percent
1950	6.16248
1955	5.60802
1960	5.38236
1965	5.2465
1970	5.11412
1975	4.97675
1980	4.81248
1985	4.59263
1990	4.6153
1995	4.3356
2000	4.09987
2005	3.87857
2010	3.68283
2015	3.65641
2020	3.64387
2025	3.65252
2030	3.71905
2035	3.93357
2040	4.27348
2045	4.72147
2050	5.2858
2055	5.9825
2060	6.80515
2065	7.73733
2070	8.73573
2075	9.78456
2080	10.86974
2085	11.97376
2090	13.06755
2095	14.13008
2100	15.1596