Year	Percent
1950	10.84588
1955	9.03665
1960	9.81959
1965	9.90676
1970	10.39631
1975	10.32033
1980	10.36939
1985	10.49454
1990	10.46763
1995	10.57465
2000	10.74416
2005	10.84299
2010	11.02849
2015	11.07767
2020	11.24734
2025	11.23074
2030	11.07882
2035	10.94291
2040	10.77079
2045	10.57146
2050	10.30281
2055	9.97756
2060	9.64706
2065	9.31931
2070	9.00369
2075	8.68809
2080	8.37207
2085	8.06849
2090	7.77907
2095	7.50144
2100	7.24115