Complex sentence: Apart from Spain and Portugal (33,217 pairs and 7,684 pairs in 2004/05 respectively), populations in southern and western Europe are generally much less stable; for instance, the Danish population declined to just three pairs in 2005.
Split into simpler sentences: Apart from Spain and Portugal (33,217 pairs and 7,684 pairs in 2004/05 respectively), populations are generally much less stable. The Danish population declined to just three pairs in 2005.