An example of an ICIO-type input-output table, with rows for MEX and CHN
disaggregated into MX1 and MX2 and CN1 and CN2, respectively.
iciotest_dataA matrix of 30 by 42, composed of two sub-matrices:
Sub-matrix Z, intermediate inputs: 30 by 30 (10 countries with 3
sectors each). 4 of those 10 are the extensions of CHN and MEX).
Sub-matrix Yfd, final demand: 30 by 12 (10 countries with 3 sectors
each in rows, 6 countries by 2 demand components each in columns).