Year	Percent
1950	10.41012
1955	10.70363
1960	10.84372
1965	10.66771
1970	9.56455
1975	10.03716
1980	10.21127
1985	10.314
1990	10.25917
1995	10.6723
2000	12.56431
2005	12.73573
2010	10.75131
2015	9.96671
2020	10.93487
2025	11.44989
2030	10.84046
2035	10.18749
2040	9.65347
2045	9.3472
2050	9.19692
2055	8.99328
2060	8.65322
2065	8.24216
2070	7.87835
2075	7.60426
2080	7.3848
2085	7.15945
2090	6.88548
2095	6.61037
2100	6.36788