Humor in the Netherlands tends to be very politically incorrect and edgy by most standards. Although these jokes may offend you, they are not usually meant in a malicious way, as the Dutch are some of the most tolerant people in the world.
Straightforward attitudes prevail in the Netherlands as the Dutch do not hold anything back when communicating.
Dutch society is very open and informal; topics that would normally be considered off-limits or risqué in daily conversation are acceptable among the Dutch.
Addressing elders by their first names is allowed in informal situations.
During birthdays, when the family comes over and brings presents, everybody sits in a circle to open the presents.
Bicycles are the most common form of transportation in the Netherlands.

https://www.cia.gov/library/publications/the-world-factbook/geos/np.html (Majority of information)
http://bit.ly/1PnWWaE (Ethnic data)
http://statline.cbs.nl/ (City population data)
http://bit.ly/2giHKTZ (Religious data)
Wolfram|Alpha (Currency exchange data)
Information accurate to best of ability as of 16 November 2016