Year	Percent
1950	27.15806
1955	27.43139
1960	27.1048
1965	27.32812
1970	27.75695
1975	27.002
1980	26.46805
1985	26.0381
1990	27.46102
1995	26.89038
2000	27.0219
2005	27.23241
2010	28.20152
2015	29.39196
2020	30.22658
2025	30.92476
2030	31.53942
2035	31.5893
2040	31.6636
2045	31.66827
2050	31.36272
2055	31.21259
2060	30.88318
2065	30.44705
2070	29.9593
2075	29.49091
2080	29.03068
2085	28.56233
2090	28.08006
2095	27.56269
2100	27.01889