The wording is little a bit off. There was 9% growth this year, but in prior years, the growth has bounced between 10% to 20% depending on the year... So the average rate of growth has been more than 9% over the last 5 years.
2010 - 30,000
2011 - 36,700
2012 - 41,000
2013 - 49,000
2014 - 56,600...