If all SCR systems were loaded with catalyst in just a one year period prior to 2005 and 2010 instead of spreading out the loading over several years, there would be sufficient accumulated supply to meet the increased demand.
Catalysts were loaded over a staggered period of time.
mnli hypothesis: Catalysts were loaded over a staggered period of time. premise: If all SCR systems were loaded with catalyst in just a one year period prior to 2005 and 2010 instead of spreading out the loading over several years, there would be sufficient accumulated supply to meet the increased demand.