Year	Percent
1950	13.44664
1955	13.52445
1960	14.03716
1965	14.72665
1970	15.11913
1975	15.14391
1980	13.92668
1985	14.86195
1990	17.75793
1995	18.5896
2000	19.23028
2005	19.50035
2010	20.75441
2015	21.7602
2020	23.4076
2025	25.63761
2030	27.54922
2035	28.9826
2040	29.94045
2045	30.59017
2050	31.02492
2055	31.39909
2060	31.36647
2065	31.36108
2070	31.7356
2075	32.20641
2080	32.7187
2085	33.13562
2090	33.49548
2095	33.8443
2100	34.25418