Year	Percent
1950	15.06855
1955	14.70537
1960	14.56153
1965	14.22894
1970	14.25331
1975	14.76074
1980	15.4899
1985	15.53726
1990	15.89961
1995	17.45536
2000	19.72672
2005	23.74889
2010	27.1295
2015	27.65785
2020	27.48818
2025	25.63808
2030	23.42853
2035	22.18465
2040	21.72286
2045	22.53356
2050	23.34169
2055	24.01321
2060	23.96438
2065	23.32609
2070	22.9766
2075	22.66098
2080	22.52411
2085	22.30027
2090	21.91782
2095	21.47108
2100	21.1142