The table shows the observing activities over the last 20 years. Note I did not observe during 1987 after three very succesfull years. Many activities occured in 1984 and 1985 when observations were carried out not only in the Netherlands but also in Puimichel. In total one quarter of all observating time Teff is acquired from outside the Netherlands. Weather in the Netherlands often is bad.
Observers located in countries with a continental climate have a sure advantage.
Over the last five years Koen has succeeded in oberving meteors during almost every clear night in the Netherlands. The maximum number of observing hours in the Netherlands is between 80 and 120.