Year	Percent
1950	31.01383
1955	29.7216
1960	28.12307
1965	25.878
1970	24.24575
1975	24.38712
1980	25.14937
1985	26.24995
1990	27.29797
1995	27.58398
2000	27.92267
2005	28.1319
2010	28.40904
2015	29.0258
2020	29.87154
2025	30.56758
2030	31.01653
2035	31.10735
2040	31.06976
2045	31.14027
2050	31.21799
2055	31.21775
2060	31.00581
2065	30.66604
2070	30.30387
2075	29.97692
2080	29.63873
2085	29.25536
2090	28.8193
2095	28.32896
2100	27.82622