Source: U.S. Census Bureau  

Release: Number of Exporters and Known Value for All Countries on a State-by-State Basis

Units:  Number of Firms, Not Seasonally Adjusted

Frequency:  Annual

This data series illustrates the movement of exports from the given state to the given country. A missing observation can mean two things. First, missing observations can appear because no exports were made to the listed country that year. Secondly, it could signify a low number of exporters thus giving away proprietary data away. International Organizations are Transnational organizations like OPEC or the EU. Basically, if a country is undocumented and EU would be used or OPEC used.