It emerges from broad trends in the economy and is a byproduct of a decade that created 17 million jobs and added 20 percent to median household net worth.

• 它随经济宏观发展趋势而出现，同时它也是这10年发展的副产品，这期间经济的发展创造了1700万个就业机会并使中等收入的家庭财产增加了20%25。