Year	Percent
1950	5.09332
1955	5.08648
1960	4.97015
1965	4.78478
1970	4.55905
1975	4.36456
1980	4.37619
1985	4.18206
1990	4.56344
1995	4.60123
2000	4.58492
2005	4.54551
2010	4.2525
2015	4.2392
2020	4.26108
2025	4.37566
2030	4.63671
2035	5.27372
2040	6.45682
2045	8.05082
2050	9.6704
2055	11.2093
2060	12.61486
2065	14.05525
2070	15.84804
2075	17.98318
2080	19.86407
2085	21.51163
2090	23.04241
2095	24.55178
2100	26.02141