Year	Percent
1950	4.84388
1955	4.23259
1960	3.99688
1965	3.9116
1970	3.86937
1975	3.9067
1980	4.0449
1985	4.17622
1990	4.51437
1995	4.62327
2000	4.65541
2005	4.49651
2010	4.22164
2015	4.10393
2020	4.0519
2025	4.146
2030	4.39818
2035	4.8441
2040	5.45807
2045	6.29515
2050	7.16126
2055	8.00293
2060	8.81664
2065	9.72324
2070	10.87356
2075	12.21384
2080	13.49025
2085	14.7081
2090	15.92358
2095	17.18306
2100	18.51231