Year | Value | 2022 | 30.885503259211 | 2021 | 29.269769887688 | 2020 | 28.899086823845 | 2019 | 26.940394869209 | 2018 | 26.803531848098 | 2017 | 26.625996338402 | 2016 | 26.782225531994 | 2015 | 27.18691270491 | 2014 | 26.863394198871 | 2013 | 25.058599232258 | 2012 | 24.208370082367 | 2011 | 25.104510323141 | 2010 | 24.846752951841 | 2009 | 24.437520691522 | 2008 | 24.26388298495 | 2007 | 27.166631500673 | 2006 | 27.938244642191 | 2005 | 26.642071089466 | 2004 | 24.37843851708 | 2003 | 23.429430887979 | 2002 | 23.105761189374 | 2001 | 23.929394182862 | 2000 | 24.213220748606 | 1999 | 25.12804108685 | 1998 | 25.577170823633 | 1997 | 25.294319380224 | 1996 | 24.756075702488 | 1995 | 24.339035284523 |
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