Photo by “AmsterDame”
According to the Fietsersbond (Dutch cyclist’s union) only 18% of Dutch will be deterred from cycling by rain and that makes them real bad weather cyclists. “Surely in comparison with the Germans. They are of sugar since at least 40% leave their bike in the shed with the appearance of a rain cloud. The Danish are somewhat tougher, there 25% let the bike stand in bad weather.”
Of the Dutch about 63% sit on a bicycle at least three times per week. Amongst the Germans and Danes that is 45%. A third of the Dutch cycle 10 to 20 kilometers per week. The Germans ride slightly less distance but more than the Danes.
No sources are given for the study but I found it in print so it must be true.