1997 28 1.9701e+012 1.6151e+012 1.3175e+012 1.0703e+012 8.6662e+011 5.0515e+011 2.9053e+011 9.3334e+010 2.9122e+010 8.8849e+009 2.6612e+009 7.8482e+008 2.2840e+008 6.5719e+007 5.2915e+006 4.1395e+005 3.1711e+004 2.3936e+003 1.7890e+002