Year % (cumulative) 1990 10.522891998291 1991 10.8265390396118 1992 11.5997629165649 1993 12.2573537826538 1994 12.9603834152222 1995 13.3497800827026 1996 13.6958312988281 1997 14.2116680145264 1998 14.5339031219482 1999 15.5469007492065 2000 16.4737777709961 2001 16.9301433563232 2002 17.5303153991699 2003 18.5525245666504 2004 18.8638000488281 2005 19.9434547424316 2006 20.8069667816162 2007 21.3405151367188 2008 22.0473480224609 2009 22.3649482727051 2010 23.5297145843506 2011 24.0856456756592 2012 24.9863147735596 2013 25.7836303710938 2014 26.1843414306641 2015 27.2951927185059 2016 26.7036800384521 2017 28.9212322235107 2018 29.5842990875244 2019 30.8724117279053 2020 32.2900848388672 2021 30.9023990631104 2022 33.855339050293 2023 34.4267082214355