Year,SSB_mmt,R_mnum
1967,1450.95,2912.4
1968,1244.41,4125.55
1969,979.686,2632.73
1970,794.644,2526.74
1971,686.286,1846.02
1972,530.878,8086.56
1973,687.446,504.404
1974,530.295,393.002
1975,359.463,1325.79
1976,217.53,1095.61
1977,134.349,1077.23
1978,161.004,1912.32
1979,173.409,1715.75
1980,180.155,409.242
1981,139.61,748.511
1982,108.207,681.454
1983,105.47,868.923
1984,138.005,709.897
1985,163.85,1677.99
1986,218.469,1045.76
1987,215.244,1299.24
1988,225.632,1660.32
1989,288.671,2715.39
1990,352.937,3518.78
1991,460.32,3963.37
1992,632.953,3568.62
1993,806.918,1288.6
1994,735.917,1592.01
1995,739.406,1916.12
1996,795.292,7223.45
1997,984.776,3068.76
1998,1031.83,2978.81
1999,1048.57,1768.03
2000,1168.85,5519.54
2001,1265.53,1158.36
2002,1054.08,1520.82
2003,1033.18,2410.82
2004,1024.84,4768.13
2005,1047.04,1483.9