Two years ago Nokia sold 30% of its smartphones in Western Europe. Today it sells 15% in that market. Its unit shipments went from 5 million to about half that and its market share went from 55% to 11%. Its rank in the market went from first to fifth.
The fall is exceptional and dramatic. The two charts below show smartphone market shares. The top chart shows global share and the second shows Western European smartphone shares (European share data sourced from IDC).
The other perspective is shown the the following chart which shows actual units shipped.