Graph showing New Zealand dollar and U.S. dollar exchange rate from January, 1990.
<a href="//commons.wikimedia.org/wiki/User:Monaneko" title="User:Monaneko">Monaneko</a>
CC BY 3.0
<a rel="nofollow" class="external free" href="https://www.federalreserve.gov/releases/H10/hist/">http://www.federalreserve.gov/releases/H10/hist/</a>