Year,North_land_mt,B_index_kg_tow,BMSY_proxy_kg_tow
1963,,3.757,2.496
1964,45,1.712,2.496
1965,37,2.509,2.496
1966,299,3.266,2.496
1967,540,1.283,2.496
1968,449,2.036,2.496
1969,240,3.705,2.496
1970,199,2.237,2.496
1971,213,2.914,2.496
1972,437,1.404,2.496
1973,708,3.114,2.496
1974,"1,200",2.063,2.496
1975,"1,877",1.711,2.496
1976,"2,256",3.387,2.496
1977,"3,167",5.568,2.496
1978,"3,976",5.101,2.496
1979,"4,068",5.133,2.496
1980,"3,623",4.458,2.496
1981,"3,171",1.984,2.496
1982,"3,860",0.936,2.496
1983,"3,849",1.617,2.496
1984,"4,202",3.01,2.496
1985,"4,616",1.441,2.496
1986,"4,327",2.353,2.496
1987,"4,960",0.873,2.496
1988,"5,066",1.525,2.496
1989,"6,391",1.384,2.496
1990,"5,802",1.001,2.496
1991,"5,693",1.235,2.496
1992,"6,923",1.104,2.496
1993,"10,645",1.044,2.496
1994,"10,950",0.973,2.496
1995,"12,032",1.711,2.496
1996,"10,762",1.071,2.496
1997,"9,794",0.669,2.496
1998,"7,367",0.974,2.496
1999,"9,260",0.825,2.496
2000,"10,685",2.495,2.496
2001,"13,500",2.048,2.496
2002,"14,029",2.103,2.496
2003,"15,103",1.925,2.496
2004,"13,164",0.638,2.496
2005,,,2.496