Year	Percent
1950	14.78215
1955	14.49163
1960	14.54811
1965	14.30823
1970	14.36611
1975	14.9413
1980	15.41241
1985	15.46557
1990	15.91842
1995	17.34163
2000	19.74861
2005	23.52886
2010	27.0107
2015	27.63866
2020	27.11525
2025	24.92951
2030	22.54951
2035	21.4997
2040	21.58355
2045	22.92943
2050	24.12978
2055	24.93367
2060	24.8075
2065	24.09201
2070	23.67787
2075	23.30023
2080	23.12758
2085	22.89384
2090	22.52014
2095	22.09282
2100	21.75273