During the early and mid-twentieth century, income from investments in Teton County mirrored that of the rest of the United States. But come the 1980s, investment income began to climb, making up 30 percent of all income in the area. It accelerated further, hitting the 40 percent mark in the 1990s, and still even further in the 2000s, when investment income made up more than half of all income in 2004.
