Year	Percent
1950	4.15865
1955	4.20528
1960	4.38848
1965	4.45562
1970	4.68301
1975	4.92024
1980	4.9593
1985	5.07081
1990	5.72385
1995	6.05679
2000	6.84796
2005	7.72033
2010	8.94607
2015	10.60167
2020	12.51157
2025	14.74474
2030	16.94301
2035	19.14091
2040	21.73802
2045	24.64826
2050	27.23547
2055	29.53018
2060	31.74399
2065	33.42226
2070	34.51842
2075	35.46685
2080	36.18811
2085	36.68073
2090	37.0024
2095	37.22281
2100	37.39268