Mellem 2008 og 2009 faldt den markant med 17 %, hvorefter den steg med fem procentpoint mellem 2009 og 2010 og med yderligere tre procentpoint i UP.
Between 2008 and 2009, it decreased significantly by 17 %, then it increased by five percentage points between 2009 and 2010 and by further three percentage points in the IP.