Year,Length_cm
1963,66.42
1964,65.38
1965,59.43
1966,63.62
1967,62.11
1968,63.48
1969,55.86
1970,62.71
1971,66.75
1972,60.81
1973,62.23
1974,54.65
1975,63.76
1976,58.57
1977,60.23
1978,64.08
1979,66.07
1980,60.40
1981,57.47
1982,65.82
1983,61.72
1984,66.18
1985,63.16
1986,61.22
1987,68.50
1988,62.00
1989,56.19
1990,56.58
1991,55.43
1992,42.65
1993,61.01
1994,31.18
1995,37.62
1996,46.29
1997,56.07
1998,45.43
1999,45.68
2000,39.74
2001,41.85
2002,57.51
2003,55.24
2004,53.81
2005,50.14