Year	Percent
1950	28.20798
1955	28.03592
1960	27.68735
1965	27.10473
1970	26.63065
1975	26.58838
1980	25.57533
1985	25.1659
1990	25.62693
1995	26.50943
2000	27.60779
2005	28.96325
2010	29.59572
2015	29.55285
2020	29.31094
2025	29.11662
2030	29.5559
2035	30.36467
2040	30.89836
2045	31.03993
2050	30.72401
2055	30.20712
2060	29.90638
2065	29.73532
2070	29.54819
2075	29.23657
2080	28.79917
2085	28.31818
2090	27.86927
2095	27.46683
2100	27.0931