Year	Percent
1950	10.27962
1955	10.54097
1960	11.07389
1965	11.45852
1970	10.39244
1975	10.4597
1980	10.58156
1985	10.72485
1990	10.7048
1995	10.66841
2000	10.68089
2005	11.49688
2010	11.44312
2015	11.39038
2020	11.29015
2025	11.54504
2030	10.81986
2035	10.66115
2040	10.43292
2045	10.13749
2050	9.77259
2055	9.42308
2060	9.10207
2065	8.7927
2070	8.51196
2075	8.23671
2080	7.96709
2085	7.69649
2090	7.43397
2095	7.18428
2100	6.94675