Year	Percent
1950	12.65999
1955	12.75724
1960	12.78207
1965	12.76424
1970	12.71554
1975	12.63925
1980	12.53541
1985	12.48597
1990	12.50799
1995	12.3304
2000	12.16567
2005	11.85469
2010	11.65977
2015	11.92041
2020	12.57688
2025	13.3471
2030	14.05793
2035	14.64633
2040	15.06878
2045	15.80544
2050	16.64231
2055	17.58248
2060	18.49275
2065	19.16675
2070	19.78935
2075	20.354
2080	20.9176
2085	21.43395
2090	21.85272
2095	22.18469
2100	22.47324