Year	Percent
1950	5.15417
1955	5.01683
1960	5.0607
1965	5.07064
1970	6.05886
1975	6.85806
1980	7.0182
1985	6.81981
1990	7.45213
1995	7.67445
2000	8.43595
2005	9.63029
2010	11.25445
2015	12.97153
2020	15.02549
2025	17.1287
2030	17.9928
2035	18.92945
2040	20.27131
2045	22.99075
2050	24.94494
2055	25.38493
2060	25.05399
2065	25.17734
2070	25.99746
2075	27.08657
2080	27.80397
2085	28.14353
2090	28.30638
2095	28.58051
2100	29.12042