Year	Percent
1950	4.85031
1955	4.79965
1960	4.4735
1965	4.20498
1970	4.22251
1975	4.35245
1980	4.42886
1985	4.68375
1990	4.86068
1995	4.74781
2000	4.40918
2005	4.54386
2010	4.54788
2015	5.18299
2020	5.92718
2025	7.084
2030	8.06292
2035	8.27246
2040	8.54291
2045	9.12066
2050	10.22504
2055	11.07549
2060	12.03279
2065	12.21744
2070	13.18993
2075	14.19128
2080	15.15385
2085	15.98007
2090	16.62124
2095	17.20082
2100	17.97133