are a number of distinguishing characteristics about Warren which render it unique among American cities of its relative size. Warren was one of the fastest-growing municipalities in the country between 1940 and 1970, roughly doubling its population every 10 years. In 1940 the official population of Warren Township was 22,146; in 1950, it was 42,653; in 1960, after Warren Township had become the City of Warren, population had risen to 89,240; and by 1970 it had grown to 179,260. Since 1970, Warren has been consistently one of the faster-declining cities in population in the country. The population declined by 10% during each of the next two decades (1980: 161,060; 1990: 144,864), and dropped by 4.6% between 1990 and 2000. In 1970, whites made up 99.5% of the city's total population of 179,270; only 838 non-whites lived within the city limits. Racial integration came slowly to Warren in the ensuing two decades, with the white portion of the city dropping only gradually to 98.2% in 1980 and 97.3% as of 1990. At that point integration started to accelerate, with the white population declining to 91.3% in 2000 and reaching 78.4% as of the 2010 census. For 2000, the non-Hispanic white population of Warren was 90.4% of the total population. African-American were 2.7% of the population (which is the same as the total non-white population in 1990), Asians were 3.1% of the population, Native Americans 0.4%, other groups 0.3% and those reporting two or more races were 2.2% of the population. Hispanics or Latinos or any race were 1.4% of the population. Warren's population was as of 2000 one of the oldest among large cities in the United States. 16.1% of Warren's population was 65 or older at the last census, tied for fifth with Hollywood, Florida among cities with 100,000+ population, and in fact the highest-ranking city by this measure outside of Florida or Hawaii. Warren is ranked 1st in the nation for longevity of residence. Residents of Warren on average have lived in that community 35.5 years, compared to the national average of eight years for communities of 100,000+ population. Warren remains a population center for people of Polish, Lebanese, Ukrainian, Albanian, Scots-Irish, Filipino, Maltese and Assyrian/Chaldean descent. The post-1970 population change in Warren has been so pronounced that by 2000 there were 1,026 Filipinos in Warren as well as 1,145 Asian Indians in the city, and 1,559 American Indians.