Year,MAB_kg_tow,GB_kg_tow,MAB_GB_kg_tow
1979,0.73,,
1980,0.62,,
1981,0.49,,
1982,0.51,0.87,0.68
1983,0.47,0.72,0.59
1984,0.45,0.54,0.50
1985,0.73,0.71,0.72
1986,1.19,0.92,1.06
1987,1.04,1.08,1.06
1988,1.68,0.90,1.32
1989,1.53,0.94,1.25
1990,1.67,1.34,1.52
1991,0.96,1.25,1.10
1992,0.54,1.64,1.05
1993,0.75,0.53,0.65
1994,1.04,0.46,0.77
1995,1.55,0.75,1.17
1996,0.77,1.33,1.03
1997,0.53,1.61,1.04
1998,1.10,4.00,2.45
1999,2.28,4.31,3.22
2000,4.01,8.13,5.93
2001,4.52,7.01,5.68
2002,5.12,8.05,6.49
2003,7.60,7.53,7.57
2004,7.30,9.60,8.37
2005,7.85,7.60,7.73