The name Airen experienced fluctuating popularity over the years, with no distinct peak or decline. The most notable periods were between 1980 and 1982, where it consistently gained traction with 6-8 births annually, and a resurgence in the late 90s to early 2000s with 5-8 births per year. Overall, Airen has maintained a steady presence, with a total of 135 births over the span of four decades.