I would like to build a portfolio from MSCI (or other index suppliers') market capitalization indices using ETFs. The portfolio should follow the relative size of the gross domestic product as closely as possible and not the countrys' relative shares in the market capitalization (the MSCI standard approach). So I need to re-weight by combining different MSCI indices (ETFs). But to achieve this I need the weights for each country's contribution in the market capitalization of the MSCI indices.
Now my problem is that on the fact sheet of e.g. the MSCI world (see, for example, developed markets factsheet), there is an 'other' category in the weights. I cannot see the weights for countries with smaller shares in the MSCI index than 3.3% (Switzerland). The countries subsumed in this category make up for 15.01% of capital in the index which is not negligible.
Does anybody know how to obtain the weights for countries within the 'other' category for the MSCI world and other MSCI indices?