Year	Percent
1950	5.79669
1955	5.38094
1960	5.11709
1965	4.94238
1970	4.80702
1975	6.02274
1980	5.12719
1985	4.97047
1990	5.31501
1995	5.64915
2000	5.2126
2005	5.54164
2010	6.16411
2015	7.52348
2020	8.59669
2025	9.17592
2030	9.06157
2035	8.24567
2040	8.02448
2045	9.71346
2050	12.05916
2055	14.95975
2060	17.79944
2065	19.80027
2070	20.86587
2075	21.55432
2080	22.57451
2085	24.01306
2090	25.64138
2095	27.02807
2100	27.94294