According to economists, since 1854, the U.S. has encountered 32 cycles of expansions and contractions, with an average of 17 months of contraction and 38 months of expansion.
據經濟學家統計，自1854年以來，美國已經經受了32個週期的擴張和收縮，平均每個經濟擴張收縮周期為17個月和38個月不等。