Year	Percent
1950	13.78043
1955	13.58446
1960	13.41509
1965	13.26204
1970	12.8457
1975	12.44449
1980	12.0163
1985	11.66625
1990	11.61483
1995	11.84679
2000	11.89928
2005	11.57918
2010	11.58098
2015	11.73061
2020	12.46131
2025	14.35745
2030	17.25126
2035	20.0919
2040	21.97287
2045	22.7521
2050	23.09614
2055	23.60457
2060	24.52658
2065	25.43672
2070	25.8756
2075	25.96462
2080	25.90284
2085	25.90272
2090	25.92787
2095	25.85956
2100	25.63959