Year	Percent
1950	15.7296
1955	15.39757
1960	14.95142
1965	14.55279
1970	14.29501
1975	13.80527
1980	13.41708
1985	13.441
1990	13.35329
1995	14.01139
2000	14.69331
2005	15.29018
2010	16.17162
2015	17.04552
2020	18.35524
2025	19.81288
2030	21.1401
2035	22.31895
2040	23.29457
2045	23.98074
2050	24.40382
2055	24.50467
2060	24.47838
2065	24.46114
2070	24.49898
2075	24.5827
2080	24.53397
2085	24.39082
2090	24.20325
2095	24.00336
2100	23.80149