 In East Germany, where Haplogroup R1a1a reaches a peak frequency in Rostock at a percentage of 31.3%, it averages between 20 and 30%.In Southern Europe R1a1a is not common, but significant levels have been found in pockets, such as in the Pas Valley in Northern Spain, areas of Venice, and Calabria in Italy.The Balkans shows lower frequencies, and significant variation between areas, for example more than 30% in Slovenia, Croatia and Greek Macedonia, but less than 10% in Albania, Kosovo and parts of Greece on south from Olympus gorge.