Year	Percent
1950	4.87611
1955	4.95945
1960	5.11101
1965	5.31233
1970	5.333
1975	5.33012
1980	5.28738
1985	5.61056
1990	7.00022
1995	7.45596
2000	7.79069
2005	8.35968
2010	8.98033
2015	10.20191
2020	11.65761
2025	13.39786
2030	15.58924
2035	18.5427
2040	21.20735
2045	23.5829
2050	25.94499
2055	28.3114
2060	30.64387
2065	32.57262
2070	34.18245
2075	35.74297
2080	37.10193
2085	38.19761
2090	39.00606
2095	39.59615
2100	40.03216