One way to measure income inequality is the Gini index. It measures between 0, a score for absolute equality and 1, which stands for a hypothetical situation in which a single household gets all income in a nation. The Census Bureau has been tracking the index for over 50 years. In 1967 it stood at 0.397 but, in 2018, it rose to 0.485, the highest figure on the record.
衡量收入差距的一种方法就是基尼系数。基尼系数最小为 0，代表绝对平均，最大为 1，代表一种某个家庭拥有全国所有收入的假设情形。过去 50 多年来，人口普查局一直在追踪这项指标。1967 年美国的基尼系数为 0.397，但 2018 年已经攀升至最高的 0.485。