Relations between the two largest groups, Macedonians and Albanians, are sometimes difficult, as in the rest of the country. Each group tolerate the other but they tend to avoid each other and live in what can appear as two parallel worlds. Both Macedonians and Albanians view themselves each as the original population of Skopje and the other as newcomers. The Roma minority is on its side very deprived. Its exact size is not known because many Macedonian Roma declare themselves as belonging to other ethnic groups or simply avoid censuses. However, even if official figures are underestimated, Skopje is the city in the world with the largest Roma population.