Due to rising imports, these numbers are also declining. Despite record sales, profit margins are declining. Since his election, his popularity is steadily declining. As a result, its population has gradually declining and rapidly aging. Over the last several decades, religious practice has been declining as secularization has increased. This proved disastrous for the already declining economy. "Yakuza" membership has been steadily declining since the 1990s. Nevertheless, this number is declining rapidly in recent years. Some economists refer only to the period when economic activity is declining. Dragonflies are steadily declining in Africa, and represent a conservation priority. Since then, the population has been declining. The higher temperature differential during periods of extreme cold leads to declining efficiency. Buddhism was declining, and Hinduism was rising. Yields and exports have both been declining since 1985. For unknown reasons, the moose population is declining rapidly in the Midwest.