Year	Percent
1950	6.34499
1955	6.73918
1960	7.23916
1965	8.20034
1970	7.16993
1975	7.61658
1980	8.86027
1985	8.50504
1990	7.12644
1995	6.12713
2000	6.42152
2005	6.89961
2010	6.55967
2015	5.99992
2020	5.56674
2025	6.02315
2030	6.08609
2035	5.99851
2040	5.82381
2045	5.56199
2050	5.42398
2055	5.46642
2060	5.5605
2065	5.57062
2070	5.48684
2075	5.3652
2080	5.2758
2085	5.25303
2090	5.2618
2095	5.25129
2100	5.20122