"Table 1 Description of the w- and l-Level Matrices
",,,
,Rows,Columns,Years
l-level,,,1961–1996
Final demand,476 commodities,122 categories, 
Use,476 commodities,167 industries ,
Make,476 commodities,167 industries  ,

w-level,,,1986–1996
Final demand,679 commodities ,138 categories,
Use,679 commodities,244 industries ,
Make,679 commodities,244 industries  ,