Year	Percent
1950	8.54575
1955	9.20191
1960	9.96697
1965	9.38213
1970	9.521
1975	9.71743
1980	10.00959
1985	10.19427
1990	10.26746
1995	10.39798
2000	10.50691
2005	10.62402
2010	10.7294
2015	10.72097
2020	10.65246
2025	10.6677
2030	10.58333
2035	10.37556
2040	10.19068
2045	10.00256
2050	9.80221
2055	9.59559
2060	9.36581
2065	9.1294
2070	8.91106
2075	8.69824
2080	8.5101
2085	8.30347
2090	8.10854
2095	7.91498
2100	7.73716