Year	Percent
1950	23.70989
1955	24.11293
1960	22.08788
1965	22.21282
1970	22.9483
1975	24.85491
1980	27.11751
1985	25.91897
1990	25.77356
1995	26.68201
2000	26.68769
2005	28.86694
2010	28.39107
2015	27.74439
2020	27.55388
2025	27.5553
2030	27.95045
2035	27.22869
2040	26.51979
2045	25.04754
2050	24.43959
2055	24.449
2060	23.95363
2065	23.98638
2070	23.25842
2075	22.65318
2080	22.44607
2085	22.54222
2090	22.67848
2095	22.6971
2100	22.53225