Year	Percent
1950	27.01634
1955	27.44951
1960	27.71581
1965	27.92546
1970	27.95811
1975	27.61705
1980	27.32013
1985	27.05795
1990	26.89956
1995	26.85759
2000	26.89462
2005	26.83509
2010	26.65861
2015	26.57081
2020	26.70757
2025	27.29444
2030	28.29632
2035	29.45974
2040	30.48181
2045	31.20796
2050	31.65779
2055	31.89763
2060	32.03596
2065	31.99783
2070	31.75496
2075	31.34533
2080	30.81727
2085	30.2728
2090	29.70127
2095	29.09613
2100	28.46212