Then the Internet happened.Although total mail volume stayed relatively steady until 2006, it has dropped an astonishing 20 percent in the past five years.

有了网络后，虽然2006年之前总的邮件数量维持在相对稳定的水平，但在过去的五年里邮件数量骤降20%。

youdao

Then the Internet happened. Although total mail volume stayed relatively steady until 2006, it has dropped an astonishing 20 percent in the past five years.

有了网络后，虽然2006年之前总的邮件数量维持在相对稳定的水平，但在过去的五年里邮件数量骤降20%。

youdao

What might be less obvious is that it has been asking for permission to do that since 2009, during which time total mail volume has fallen more than 5% and First-Class volume has drop by more than 12%.

FORBES: First Class Mail is Doomed. Get Over it.