Year	Percent
1950	10.50998
1955	10.48755
1960	10.44974
1965	10.55398
1970	10.29134
1975	10.45915
1980	10.51358
1985	10.62456
1990	10.80855
1995	10.99761
2000	11.08244
2005	10.68153
2010	10.58521
2015	10.66869
2020	10.8273
2025	11.10339
2030	11.11321
2035	10.76879
2040	10.5282
2045	10.36915
2050	10.21308
2055	10.00664
2060	9.75013
2065	9.46362
2070	9.20012
2075	8.96355
2080	8.71682
2085	8.4816
2090	8.23521
2095	7.99611
2100	7.77243