Year	Percent
1950	2.13101
1955	2.42641
1960	3.46592
1965	4.66342
1970	6.40404
1975	7.65294
1980	8.14243
1985	7.94219
1990	9.37734
1995	9.47849
2000	10.51383
2005	11.8342
2010	14.32993
2015	16.88409
2020	20.00555
2025	23.32037
2030	24.98212
2035	25.67781
2040	25.36853
2045	24.49558
2050	23.86785
2055	25.411
2060	27.21744
2065	28.89836
2070	30.32485
2075	30.74733
2080	31.17276
2085	31.74377
2090	32.52721
2095	33.29228
2100	33.84647