Demographically, Warsaw was the most diverse city in Poland, with significant numbers of foreign-born residents. In addition to the Polish majority, there was a large and thriving Jewish minority. According to the Imperial Census of 1897, out of the total population of 638,000, Jews constituted 219,000 (equivalent to 34%). Prior to the Second World War, Warsaw hosted the world's second largest Jewish population after New York – approximately 30 percent of the city's total population in the late 1930s. In 1933, 833,500 out of 1,178,914 people declared Polish as their mother tongue. There was also a notable German community. The ethnic composition of contemporary Warsaw is incomparable to the diversity that existed for nearly 300 years. Most of the modern-day population growth is based on internal migration and urbanisation.