Just to see if there were any other "holes" in the goods flow, I wrote a little Perl program, to which you give it the argument *.dat (all the data files in the current directory) and it prints a report of, for each commodity, sorted by year, the sources and consumers. It's not quite perfect as it ignores the months and just looks at years. Still it's interesting to see how things change over the years. You can also see how in the 1990s the industrial base dries up. There may indeed be a few "holes" that need checking, as how the IronOreMine1950 ceases in January 1970 but the IronOreMine1970 only starts in March of 1972.
The output sections look like this:
### beer ###
1750: Brewery1750 --> Pub1750
1840: Brewery1750,Brewery1840 --> Pub1840,Pub1750
1841: Brewery1840 --> Pub1840
1910: Brewery1840,Brewery1910 --> Pub1840,Pub1910
1911: Brewery1910 --> Pub1910
1945: Brewery1945,Brewery1910 --> Pub1945,Pub1910
1946: Brewery1945 --> Pub1945
1975: Brewery1975,Brewery1945 --> Pub1945,PetrolStation1975
1976: Brewery1975 --> Pub1945,PetrolStation1975
... Enjoy!
http://blog.wlindley.com/wp-content/uploads/show_industries.pl