Year,Spring_kg_tow,Fall_kg_tow
1968,1.956,7.86
1969,3.082,3.936
1970,0.515,2.282
1971,0.762,4.313
1972,6.643,2.767
1973,5.354,6.161
1974,1.72,4.06
1975,3.997,2.56
1976,1.308,5.671
1977,0.559,5.088
1978,0.25,3.614
1979,1.047,12.703
1980,3.197,15.06
1981,2.474,9.259
1982,2.549,4.134
1983,3.897,12.454
1984,0.711,11.243
1985,1.601,15.77
1986,2.784,5.967
1987,0.574,5.106
1988,0.478,7.277
1989,0.761,11.783
1990,0.36,9.899
1991,1.009,4.045
1992,0.607,4.917
1993,0.807,10.821
1994,1.45,13.81
1995,2.205,5.843
1996,0.512,2.867
1997,3.414,2.756
1998,2.144,7.097
1999,2.457,4.93
2000,0.99,7.515
2001,1.888,2.541
2002,1.705,1.29
2003,1.394,2.507
2004,2.058,1.105
2005,1.259,0.764