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Over the past 100 years, the average July temperature in Phoenix has risen dramatically. In the 1920s, it ranged from 89.3 to 92.7 degrees; in the past decade, it sat between 94.7 and 102.7 degrees.
Women have lighter skin than men of the same population; this has been explained by a higher need for vitamin D in females during pregnancy and lactation. [278] As there are chromosomal differences between females and males, some X and Y chromosome-related conditions and disorders only affect either men or women. [ 279 ]
In 2006, the median individual income of a White American age 25 or older was $33,030, with those who were full-time employed, and of age 25 to 64, earning $34,432. Since 42% of all households had two income earners, the median household income was considerably higher than the median personal income, which was $48,554 in 2005.
The population is almost equally split between men and women, with men making up 50.2% of city's citizens. The population density is 2,797.8 people per square mile, and the city's median age is 32.2 years, with only 10.9 of the population being over 62. 98.5% of Phoenix's population lives in households with an average household size of 2.77 people.
Temperatures measured directly on the ground may exceed air temperatures by 30 to 50 °C. [107] A ground temperature of 84 °C (183.2 °F) has been recorded in Port Sudan , Sudan . [ 108 ] A ground temperature of 93.9 °C (201 °F) was recorded in Furnace Creek , Death Valley , California , United States on 15 July 1972; this may be the highest ...
As of the 2010 census, Pennsylvania had the fourth-highest proportion of elderly (65+) citizens in the nation at 15.4%, compared to a national average of 13.0%. [126] According to U.S. Census Bureau estimates, the state's poverty rate was 12.5% in 2017 compared to 13.4% for the U.S. as a whole.
The plant hardiness zone at Atlantic City Beach is 7b with an average annual extreme minimum air temperature of 11.0 °F (−11.7 °C). [91] The average seasonal (November–April) snowfall total is 12 to 18 in (300 to 460 mm), and the average snowiest month is February which corresponds with the annual peak in nor'easter activity.
Those who quit smoking gain an average of 4.4 kilograms (9.7 lb) for men and 5.0 kilograms (11.0 lb) for women over ten years. [156] However, changing rates of smoking have had little effect on the overall rates of obesity.