Year	Percent
1950	4.9053
1955	4.8104
1960	4.8073
1965	4.70876
1970	4.65174
1975	4.60142
1980	4.55927
1985	4.61576
1990	4.78874
1995	4.751
2000	4.68961
2005	4.60065
2010	4.54185
2015	4.47505
2020	4.51597
2025	4.62235
2030	4.79066
2035	5.10684
2040	5.54126
2045	6.00537
2050	6.43078
2055	6.86206
2060	7.42988
2065	8.20972
2070	9.15336
2075	10.22144
2080	11.29904
2085	12.41849
2090	13.59339
2095	14.82669
2100	16.10124