To better understand values of dimensions in your dataset switch display of the Data pane to Facets.
Now each facet displays a list of unique values of corresponding dimension. And you can see the number of unique values in the given dimension right next the to facet’s name. In this case there are 32 distinct values of Country
in example above.
If a dimension has more than 100 values, like in case of the Date dimension, then 100+
is displayed by default. Click on it to force the facet view to calculate the exact number of distinct values of corresponding dimension.