Year	Percent
1950	10.48703
1955	10.61103
1960	10.69248
1965	10.62472
1970	10.29875
1975	10.77279
1980	11.10073
1985	10.36708
1990	10.02428
1995	10.39677
2000	11.06164
2005	10.73363
2010	9.43778
2015	9.77729
2020	9.12041
2025	9.74037
2030	9.12638
2035	8.85745
2040	8.53038
2045	8.25326
2050	8.03573
2055	7.83187
2060	7.62705
2065	7.41231
2070	7.17567
2075	6.95712
2080	6.74631
2085	6.55703
2090	6.3603
2095	6.17299
2100	5.99932