Year	Percent
1950	10.27027
1955	9.9163
1960	9.60275
1965	9.39878
1970	10.86544
1975	11.25386
1980	11.05889
1985	9.89113
1990	9.20283
1995	10.43491
2000	11.7169
2005	12.13071
2010	11.34201
2015	10.23187
2020	9.96832
2025	10.76037
2030	11.20684
2035	11.23989
2040	10.78846
2045	10.2568
2050	10.04435
2055	10.05201
2060	9.99617
2065	9.75084
2070	9.40273
2075	9.08145
2080	8.87795
2085	8.74674
2090	8.57906
2095	8.34575
2100	8.05445