For a Bronze age book I won't go as low as 2.0 to see the swing. So I did 9.2, 8.0 and 5.0....all show a nice increase for IH 181. However, it's not as steep an increase in a key book as I would like to see. For me, it's the 5 year swing and % of increase
9.2 shows a steady increase
2015
(2) $3,600Hi $2,950Lo
2014
(22) $3,200Hi $1,937Lo
2013
(41) $2,330Hi $1,795Lo
2012
(29) $2,295Hi $1,500Lo
2011
(23) $1,895Hi $1,308Lo
2010
(24) $2,500Hi $1,098Lo
2009
(22) $1,950Hi $1,300Lo
2008
(20) $2,195Hi $1,235Lo
2007
(34) $1,995Hi $1,100Lo
2006
(20) $1,550Hi $900Lo
2005
(41) $1,725Hi $1,000Lo
2004
(61) $1,600Hi $1,050Lo
2003
(51) $1,725Hi $1,035Lo
2002
(31) $1,550Hi $810Lo
An 8.0 shows a rise also
2015
(4) $1,750Hi $1,675Lo
2014
(42) $2,041Hi $850Lo
2013
(29) $1,550Hi $751Lo
2012
(25) $1,170Hi $499Lo
2011
(34) $1,016Hi $580Lo
2010
(32) $1,000Hi $593Lo
2009
(39) $1,043Hi $620Lo
2008
(29) $925Hi $500Lo
2007
(32) $850Hi $461Lo
2006
(37) $847Hi $400Lo
2005
(40) $800Hi $474Lo
2004
(27) $772Hi $490Lo
2003
(46) $949Hi $450Lo
2002
(19) $776Hi $430Lo
5.0 shows a nice increase over time
2015
(1) $900Hi
2014
(15) $965Hi $500Lo
2013
(17) $699Hi $485Lo
2012
(14) $640Hi $348Lo
2011
(12) $435Hi $275Lo
2010
(6) $475Hi $323Lo
2009
(11) $400Hi $250Lo
2008
(13) $337Hi $197Lo
2007
(12) $450Hi $228Lo
2006
(13) $281Hi $188Lo
2005
(11) $275Hi $203Lo
2004
(13) $336Hi $193Lo
2003
(19) $500Hi $188Lo
2002
(5) $291Hi $193Lo