From the April Alaska Economic Trends: "Alaska has one of the highest rates of population turnover in the nation — there are always large numbers of people moving in and out, regardless of whether the overall population is growing or shrinking.
"Depending on the year and data source, between 5 and 7 percent of Alaska’s population enters or leaves the state each year. These large flows in and out, or “gross migration,” tend to be fairly stable and predictable. While gross migration flows explain how the makeup of the population changes, “net migration” measures the effect on the total population count — just one effect of moves.
"Net migration — the number who move in minus those who move out — is much more volatile, and it’s important to remember it’s just at the surface of the much larger and more consistent in-and-out migration flows. Even during the years that Alaska has a net migration loss, more than 30,000 people still arrive here each year."