Year	Percent
1950	6.4217
1955	5.48662
1960	4.94156
1965	4.65145
1970	4.56412
1975	4.58251
1980	4.56583
1985	4.52119
1990	4.72777
1995	4.72761
2000	4.55759
2005	4.45824
2010	4.41146
2015	4.51278
2020	4.68847
2025	4.97731
2030	5.39878
2035	5.9897
2040	6.69645
2045	7.41405
2050	8.08885
2055	8.63475
2060	9.22445
2065	10.06299
2070	11.07018
2075	12.05164
2080	12.95288
2085	13.81274
2090	14.70408
2095	15.63816
2100	16.59998