Here are the numbers:
|Beer production in 1892|
|Lower Austria (including Vienna)||44,000,000||1,222,222|
|Nottingham Evening Post - Wednesday 21 February 1894, page 2.|
Notice one glaring absence? That's right, it's the UK. They only seem to have bothered with countries in Continental Europe. Annoyingly, I don't have numbers for the UK for 1892. These are the closest ones I have: 1891 31,927,053 barrels* and 1895 31,678,486 barrels**. So around 31 million barrels is a fair guess. Which means the UK was responsible for around 27% of Europe's beer production. And it had the largest beer production of anywhere in the world.
The biggest surprise to me is Belgium, which wasn't far behind Austria, a much larger and more populous country. And twice as much as Bohemia, not exactly a beer-free region and one with not that much smaller a population than Belgium.
* "Ireland Industrial and Agricultural", 1902, page 458.
** Brewers' Almanack 1928.