constant inflow of migrants in recent years has fuelled population growth in Budapest. Productivity gains and the relatively large economically active share of the population explain why household incomes have increased in Budapest to a greater extent than in other parts of Hungary. Higher incomes in Budapest are reflected in the lower share of expenditure the city's inhabitants allocate to necessity spending such as food and non-alcoholic drinks. At the 2016 microcensus, there were 1,764,263 people with 907,944 dwellings living in Budapest. Some 1.6 million persons from the metropolitan area may be within Budapest's boundaries during work hours, and during special events. This fluctuation of people is caused by hundreds of thousands of suburban residents who travel to the city for work, education, health care, and special events. By ethnicity there were 1,697,039 (96.2%) Hungarians, 34,909 (2%) Germans, 16,592 (0.9%) Romani, 9,117 (0.5%) Romanians and 5,488 (0.3%) Slovaks. In Hungary people can declare multiple ethnic identities, hence the sum may exceed 100%. The share of ethnic Hungarians in Budapest (96.2%) is slightly lower than the national average (98.3%) due to the international migration. According to the 2011 census, 1,712,153 people (99.0%) speak Hungarian, of whom 1,692,815 people (97.9%) speak it as a first language, while 19,338 people (1.1%) speak it as a second language. Other spoken (foreign) languages were: English (536,855 speakers, 31.0%), German (266,249 speakers, 15.4%), French (56,208 speakers, 3.3%) and Russian (54,613 speakers, 3.2%). According to the same census, 1,600,585 people (92.6%) were born in Hungary, 126,036 people (7.3%) outside Hungary while the birthplace of 2,419 people (0.1%) was unknown. Although only 1.7% of the population of Hungary in 2009 were foreigners, 43% of them lived in Budapest, making them 4.4% of the city's population (up from 2% in 2001). Nearly two-thirds of foreigners living in Hungary were under 40 years old. The primary motivation for this age group living in Hungary was employment. Budapest is home to one of the most populous Christian communities in Central Europe, numbering 698,521 people (40.4%) in 2011. According to the 2011 census, there were 501,117 (29.0%) Roman Catholics, 146,756 (8.5%) Calvinists, 30,293 (1.8%) Lutherans, 16,192 (0.9%) Greek Catholics, 7,925 (0.5%) Jews and 3,710 (0.2%) Orthodox in Budapest. 395,964 people (22.9%) were irreligious while 585,475 people (33.9%) did not declare their religion. The city is also home to one of the largest Jewish communities in Europe. Economy Budapest is a significant economic