Year Domestic Commercial Total
2004 143.5 164.2 307.7
2005 148.3 169.4 317.7
2006 153.2 175.6 328.7
2007 152.6 178.9 331.5
2008 154.6 186.2 340.8
2009 160.2 194.2 354.4
2010 163 198.5 361.5
2011 169.9 202.6 372.5
2012 162 196.4 358.4
2013 170.6 193.9 364.5
2014 173.1 191.5 364.6
2015 163.5 183.2 346.7
2016 167.6 181.7 349.4
2017 173.6 180.6 354.2
2018 173 174.6 347.6