Question: How many non-Hispanic whites lived in the city the author of Hallucinations worked in?

Hallucinations is a 2012 book written by the neurologist Oliver Sacks. In "Hallucinations", Sacks recounts stories of hallucinations and other mind-altering episodes of both his patients and himself and uses them in an attempt to elucidate certain features and structures of the brain including his own migraine headaches. <SEP> leslie crichton porteous (1901–1991) was an author (writing under the name of crichton porteous) of fiction and non-fiction – books, articles and short stories – many of them about life in the peak district of northern england, and often set in specific peak locations ("toad hole" and "broken river", for example, are set in the derwent valley). <SEP> New York City has the largest European and non-Hispanic white population of any American city. The European diaspora residing in the city is very diverse. According to 2012 Census estimates, there were roughly 560,000 Italian Americans, 385,000 Irish Americans, 253,000 German Americans, 223,000 Russian Americans, 201,000 Polish Americans, and 137,000 English Americans. Additionally, Greek and French Americans numbered 65,000 each, with those of Hungarian descent estimated at 60,000 people. Ukrainian and Scottish Americans numbered 55,000 and 35,000, respectively. People identifying ancestry from Spain numbered 30,838 total in 2010. People of Norwegian and Swedish descent both stood at about 20,000 each, while people of Czech, Lithuanian, Portuguese, Scotch-Irish, and Welsh descent all numbered between 12,000–14,000 people. Arab Americans number over 160,000 in New York City, with the highest concentration in Brooklyn. Central Asians, primarily Uzbek Americans, are a rapidly growing segment of the city's non-Hispanic white population, enumerating over 30,000, and including over half of all Central Asian immigrants to the United States, most settling in Queens or Brooklyn. Albanian Americans are most highly concentrated in the Bronx. At 2.7 million in 2012, New York's non-Hispanic white population is larger than the non-Hispanic white populations of Los Angeles (1.1 million), Chicago (865,000), and Houston (550,000) combined. <SEP> in 1940, non-hispanic whites constituted 86.8% of the city's population. the population peaked at more than two million residents in 1950, then began to decline with the restructuring of industry, which led to the loss of many middle-class union jobs. in addition, suburbanization had been drawing off many of the wealthier residents to outlying railroad commuting towns and newer housing. revitalization and gentrification of neighborhoods began in the late 1970s and continues into the 21st century, with much of the development in the center city and university city areas of the city. after many of the old manufacturers and businesses left philadelphia or shut down, the city started attracting service businesses and began to more aggressively market itself as a tourist destination. glass-and-granite skyscrapers were built in center city. historic areas such as independence national historical park located in old city and society hill were renovated during the reformist mayoral era of the 1950s through the 1980s. they are now among the most desirable living areas of center city. this has slowed the city's 40-year population decline after it lost nearly one-quarter of its population. <SEP> Migraine is the first book written by Oliver Sacks, a well-known neurologist and author with a practice in New York City. The book was written in 1967, mostly over a nine-day period, and first published in 1970. A revised and updated version was published in 1990. (In the 1990 revised edition, the last chapter "Migraine Aura and Hallucinatory Constants" was written in collaboration with Ralph M. Siegel.)