Year	Percent
1950	1.93256
1955	2.3372
1960	2.9221
1965	3.36428
1970	4.95064
1975	6.92444
1980	8.00995
1985	9.22007
1990	11.58622
1995	13.24808
2000	14.51434
2005	15.4015
2010	18.82165
2015	22.41029
2020	26.92332
2025	30.70697
2030	32.24573
2035	33.25607
2040	33.81968
2045	34.22548
2050	34.26062
2055	34.30433
2060	33.71431
2065	32.34951
2070	31.99197
2075	32.03685
2080	32.90588
2085	34.0206
2090	35.07542
2095	35.57522
2100	35.80074