_id año valor 1 1998 4.52 2 1999 -1.94 3 2000 -1.93 4 2001 -3.84 5 2002 -7.73 6 2003 0.81 7 2004 5 8 2005 7.46 9 2006 4.1 10 2007 6.54 11 2008 7.18 12 2009 4.24 13 2010 7.8 14 2011 5.16 15 2012 3.54 16 2013 4.64 17 2014 3.24 18 2015 0.37 19 2016 1.69 20 2017 2.59 21 2018 1.62