Year	Percent
1950	7.82326
1955	6.19269
1960	6.23219
1965	7.77662
1970	8.21912
1975	9.70218
1980	9.27334
1985	8.89344
1990	8.31482
1995	9.27512
2000	8.35886
2005	9.24587
2010	8.66957
2015	9.27744
2020	9.49304
2025	9.42751
2030	8.87287
2035	8.31603
2040	8.05342
2045	7.98756
2050	7.92883
2055	7.78858
2060	7.54629
2065	7.26248
2070	7.01318
2075	6.8345
2080	6.69903
2085	6.55062
2090	6.37194
2095	6.18197
2100	6.01571