Year	Percent
1950	6.98265
1955	5.93509
1960	5.4307
1965	5.28815
1970	5.34403
1975	5.50029
1980	5.62027
1985	5.69253
1990	6.02103
1995	6.00499
2000	5.78235
2005	5.43433
2010	5.22723
2015	5.39964
2020	5.57133
2025	5.73873
2030	5.89305
2035	6.1521
2040	6.60459
2045	7.24236
2050	8.04338
2055	8.98789
2060	10.07253
2065	11.29797
2070	12.63899
2075	14.03812
2080	15.47388
2085	16.93519
2090	18.40477
2095	19.8597
2100	21.28564