Found this website; can't vouch for figures; may be compiled from manufacturers and/or national motor trade bodies 
http://left-lane.com
http://left-lane.com/european-sales-2016-q1-q3-midsized-crossover-segment/
http://left-lane.com/european-car-sales-data/seat/
http://left-lane.com/european-car-sales-data/seat/seat-ateca/
http://left-lane.com
http://left-lane.com/european-sales-2016-q1-q3-midsized-crossover-segment/
http://left-lane.com/european-car-sales-data/seat/
http://left-lane.com/european-car-sales-data/seat/seat-ateca/