Year	Percent
1950	11.91215
1955	10.32368
1960	11.87325
1965	10.68674
1970	10.40576
1975	10.03882
1980	10.0957
1985	10.02422
1990	11.64576
1995	11.65583
2000	10.84564
2005	10.41266
2010	10.17622
2015	10.47526
2020	10.65299
2025	10.73036
2030	10.24741
2035	9.5758
2040	9.16762
2045	8.95523
2050	8.79678
2055	8.55469
2060	8.23904
2065	7.88226
2070	7.57229
2075	7.30361
2080	7.08265
2085	6.8567
2090	6.62238
2095	6.38469
2100	6.16461