value 4.2 5.1 5.4 5.8 6.0 6.1 6.4 6.7 7.0 7.2 7.5 7.8 8.1 8.4 8.8 9.2 9.6 10.1 10.8 11.4 12.0 12.9 13.7 14.8 16.2 18.0 20.4 24.1 29.5 38.0 12.2 8.6 7.1 6.5 9.9 11.1 13.0 15.5 19.2 6.8 7.4 8.0 8.9 10.4 14.1 22.0 5.9 6.3