&thirtys=<span class="yeartext">1930s</span><br><br>
<span class="content">Commercial airlines operate a national route network, created and subsidized by the Post Office, and offer transcontinental service for the first time. Most of today's major airlines are established and expand rapidly.
<b>385,910</b> passengers fly</span>


&fourtys=<span class="yeartext">1940s</span><br /><br />
<span class ="content">Most of America's large airlines are in full operation. They fly a broad national route network with such advanced aircraft as the Douglas DC-3 and Boeing 307.
<b>2,727,820</b> passengers fly</span>
<img src="30.jpg" width="330" height="150" />

&fiftys=<span class="yeartext">1950s</span><br><br>
<span class="content">A post-war surge in passengers spurs the introduction of long-range aircraft that offer one-stop and later nonstop transcontinental service. Airliners surpass trains and ocean liners as the preferred means of long-distance travel. Coach-class service is introduced.
<b>15,978,172</b> passengers fly.</span>

&sixtys=<span class="yeartext">1960s</span><br><br>
<span class="content">The Boeing 707 and Douglas DC-8 jetliners revolutionize air travel. They drastically cut travel time along the major transcontinental routes.
<b>62,258,000</b> passengers fly</span>

&seventys=<span class="yeartext">1970s</span><br><br>
<span class="content">The jet age is in full swing. Airlines expand rapidly, and their long- and short-range jets serve most cities. 
<b>169,922,000</b> passengers fly</span>

&eightys=<span class="yeartext">1980s</span><br><br>
<span class="content">Two years after deregulation. Air travel is transformed, as old and new airlines rush to create a hub-and-spoke route network to economize aircraft use.
<b>296,903,000</b> passengers fly</span>

&ninetys=<span class="yeartext">1990s</span><br><br>
<span class="content">Post-deregulation turmoil reigns, as efficiency drives airline reorganizations and mergers. The hub-and-spoke system increases passenger loads and productivity while lowering fares, but it also makes travel slower and less comfortable.
<b>465,557,000</b> passengers fly</span>

&present=<span class="yeartext">2000</span><br><br>
<span class="content">The airline system continues to evolve, with more mergers, the decline of "legacy" airlines, and the rise of sound, low-cost airlines. The hub-and-spoke system still dominates, but direct flights increase. 
<b>665,513,000</b> passengers fly</span>
