Year	Percent
1950	13.70526
1955	13.69869
1960	13.78278
1965	13.66877
1970	13.56916
1975	13.41125
1980	13.53575
1985	13.30371
1990	13.24712
1995	12.82563
2000	12.51916
2005	12.14041
2010	12.30764
2015	12.69181
2020	13.27543
2025	14.50888
2030	15.79966
2035	17.62764
2040	19.84183
2045	21.67371
2050	23.0923
2055	24.06459
2060	24.59108
2065	24.98967
2070	25.40074
2075	25.59869
2080	25.6007
2085	25.49163
2090	25.33763
2095	25.1396
2100	24.90568