As we can guess, December spending peaks for Americans during the holiday season, and this was the case just last month. Upper-income Americans, those whose household incomes are $90,000 or more a year, had daily spending reports averaging $177 in December, among the highest for this group in 2014, and over the years since the recession. Spending among middle- and lower-income Americans was also higher than that found in most other monthly readings Gallup has conducted in the past several years.