Year	Percent
1950	3.45356
1955	3.81408
1960	4.041
1965	4.21398
1970	4.38102
1975	4.46676
1980	4.51282
1985	4.56717
1990	4.88778
1995	4.84925
2000	5.16117
2005	6.39756
2010	7.36104
2015	8.22215
2020	8.65263
2025	9.29234
2030	10.01012
2035	10.91339
2040	11.86383
2045	13.02578
2050	14.6762
2055	17.24561
2060	21.25562
2065	25.43148
2070	28.78634
2075	31.01866
2080	33.04987
2085	34.83766
2090	36.24764
2095	37.1654
2100	37.73538