Task: Question Generation
Input (English): Passage: The commune of Aix-les-Bains had approximately 14,086 total jobs (employee + self-employed) in 1999, including 1,039 salaried jobs. The average annual rate of change of total employment, between 1990 and 1999, was 0.07%. The number of jobseekers (categories 1-2-3-HAR) on 31 December 2006 was 1,412 with a 13.7% unemployment rate. The rate of activity for those between 20 and 59 years of age stood at 82%, which equals the national average of 82.2%. There were 42.9% of working age against 24.3% of retirees whose number is well above the national average of 18.2%. There were 20.5% of school age and 12.2% of people without activity.
Output (English): How many years passed between 1990 and 1999 that changed the annual total of employment?