Supermarket chains Albert Heijn and Jumbo together now control over 50% of the Dutch market, according to new figures from retail research group IRI.

Both Albert Heijn and Jumbo boosted their market share last year – AH was responsible for 35% of supermarket sales in the Netherlands last year and Jumbo 17%. Two years ago, Jumbo’s market share was just 11%.

In total, Dutch supermarkets had sales of almost €36bn last year, a rise of 5% on 2014. This is partly due to differences in the number of shopping days.

Almost 20% of total sales were generated by discount campaigns. German discount supermarket groups Aldi and Lidl have combined market share of 16%.