Production in the interwar years mirror the waxing and waning of the world economy, with the impact of the Wall Street Crash of 1929 plainly visible. Just as in the UK, just when things were starting to pick up in the late 1930s, an annoying was came along to mess everything up.
The continued increase in output in the first couple of years of the German occupation came at a price: a big reduction in strength. By the end, it wasn't intoxicating at all. Unlike in the UK, where at least average strength never dropped below 3% ABV.
At the start of WW II, a huge percentage of Dutch beer came from just a couple of breweries. Out of total production in 1939 of 1,508,000 hl, Heineken (Rotterdam) brewed 232,226 hl and Amstel 279,801 hl. Assuming Heineken's Amsterdam brewery produced something similar to their Rotterdam plant, along with Amstel they must have been responsible for half of all Dutch beer.
|Dutch beer production 1925 - 1970|
|"European Statistics 1750-1970" by B. R. Mitchell, 1978, pages 268- 288.|