The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information,
make sure you're on a federal government site.
The site is secure. The
https:// ensures that you are connecting to the official website and that any
information you provide is encrypted and transmitted securely.
Productivity gains averaged 1.9 percent per year over the 1966-78 period; however, year-to-year changes fluctuated widely, reacting to the level of unemployment.