According to results of the 2011 census, the majority of the inhabitants of the Czech Republic are Czechs (64.3%), followed by Moravians (5.0%), Slovaks (1.4%), Ukrainians (0.5%), Poles (0.4%), Viets (0.3%), Germans (0.2%) and Silesians (0.1%). As the 'nationality' was an optional item, a number of people left this field blank (25.3%). According to some estimates, there are about 250,000 Romani people in the Czech Republic. The Polish minority resides mainly in the Zaolzie region.