Year	Percent
1950	11.42556
1955	10.96972
1960	10.87726
1965	11.76797
1970	11.44566
1975	11.66769
1980	10.52937
1985	9.54112
1990	10.64979
1995	11.73489
2000	10.84812
2005	9.72602
2010	7.30801
2015	7.72611
2020	8.31217
2025	8.3256
2030	7.94519
2035	7.45813
2040	6.91981
2045	6.3106
2050	5.94358
2055	5.8307
2060	5.76408
2065	5.68939
2070	5.56018
2075	5.42179
2080	5.33027
2085	5.29185
2090	5.29366
2095	5.28135
2100	5.23874