Year	Percent
1950	5.57051
1955	4.91894
1960	4.65618
1965	4.56411
1970	4.51616
1975	4.53347
1980	4.66894
1985	4.76863
1990	5.15712
1995	5.26495
2000	5.30798
2005	5.24629
2010	5.12394
2015	5.20554
2020	5.36229
2025	5.66257
2030	6.11695
2035	6.76124
2040	7.53963
2045	8.48536
2050	9.41163
2055	10.30443
2060	11.1722
2065	12.13058
2070	13.34449
2075	14.75529
2080	16.08967
2085	17.34556
2090	18.57231
2095	19.81453
2100	21.08843