Year	Percent
1950	6.56268
1955	7.35715
1960	8.24604
1965	9.13365
1970	9.94097
1975	10.48924
1980	10.85953
1985	11.2127
1990	13.0243
1995	13.29627
2000	13.52835
2005	13.82686
2010	14.38831
2015	15.10758
2020	15.87326
2025	16.63299
2030	17.44172
2035	18.6098
2040	20.44094
2045	21.93611
2050	23.45009
2055	24.95561
2060	26.23453
2065	27.55743
2070	28.79824
2075	30.01807
2080	31.12994
2085	32.14497
2090	33.07038
2095	33.91715
2100	34.69153