Year	Percent
1950	6.7663
1955	6.70257
1960	7.01213
1965	7.43873
1970	7.42358
1975	6.85146
1980	6.35956
1985	6.08639
1990	7.16225
1995	6.4898
2000	5.80407
2005	5.08183
2010	4.96748
2015	5.71087
2020	6.99315
2025	8.41196
2030	9.7207
2035	10.85657
2040	11.84598
2045	13.23901
2050	15.27197
2055	16.90075
2060	18.15931
2065	18.88753
2070	20.11646
2075	21.88145
2080	23.5855
2085	25.01446
2090	26.20765
2095	27.42731
2100	28.82517