Since you are using personal edition, I will not post your example back, but please, check the number format of your 'Longitude'.
You can try this:create a new table box and include the fields: Inwoners, Latitude and Longitude.
You will see that the field Longitude was not recognized as a number, but as a text due to the dot as the separator.
You can try to fix it at the souce, or use num# to force the interpretation of your number. using num#() function:
num#(Longitude, '#,##.##', '.', ',')
Your load script would look like this (more or less) :
num#(Longitude, '#,##.##', '.', ',') as Longitude,
(biff, embedded labels, table is Vakantieplaatsen$);
Hope this helps,
Erich is right it has something to do with the number format.
As you can see in your data, your Latitude has comma's and your Longitude has dots.
If Enrich's solution is not working try to play around with the following in your load script:
Replace(Latitude , ',' , '.' ) as Latitude,
Replace(Longitude , ',' , '.' ) as Longitude
This will replace the comma's for dots.
Or the other way around (depending on your settings):
Replace(Latitude , '.' , ',' ) as Latitude,
Replace(Longitude , '.' , ',' ) as Longitude
Mocht het niet lukken laat het dan even weten.