In Oregon, Chinook Jargon was widely used by Natives, trappers, traders, employees of the Hudson's Bay Company, missionaries, and pioneers who came across the Oregon Trail from the 1830s-1870s. In Portland's first half century (1840s-1890s) there were frequent trade interactions between pioneers and Native Americans. After about 1900, when such daily interactions were less frequent, Jargon was spoken among pioneer families to prove how early they arrived out west. Many Oregonians used Jargon in casual conversation—to add humor, whimsy or emphasis and to exhibit deep knowledge of Oregon's history. Though traditions of speaking Jargon faded away among the non-Native population, some of Oregon's tribal groups continued speaking Chinook Jargon, though usage was diminished.