Year	Percent
1950	4.09559
1955	4.31116
1960	4.4194
1965	4.59053
1970	4.71614
1975	4.8003
1980	4.76469
1985	4.6034
1990	4.41753
1995	3.91669
2000	3.49803
2005	3.25954
2010	3.12312
2015	3.08134
2020	3.2037
2025	3.44951
2030	3.80624
2035	4.21647
2040	4.75307
2045	5.35623
2050	5.95199
2055	6.59205
2060	7.32855
2065	8.19965
2070	9.23279
2075	10.30739
2080	11.38836
2085	12.48662
2090	13.63007
2095	14.82408
2100	16.05371