| Year | Value | | 2022 | 1.0161297549173 | | 2021 | 0.92986356745831 | | 2020 | 0.98311060292051 | | 2019 | 1.0152951586399 | | 2018 | 1.0485652767419 | | 2017 | 1.0371853369339 | | 2016 | 1.2080671655412 | | 2015 | 1.2819718193463 | | 2014 | 1.1283850454994 | | 2012 | 0.99914272282293 | | 2011 | 1.0938066399949 | | 2010 | 0.95285512473335 | | 2009 | 0.95476850864092 | | 2008 | 1.02218713975 | | 2004 | 1.131336327716 | | 2003 | 1.1187914950836 | | 2002 | 1.0488369333017 | | 2001 | 0.58078388249617 | | 2000 | 0.59817453250223 | | 1999 | 1.3920446096654 | | 1998 | 1.7130316035895 | | 1997 | 1.6950949367089 | | 1996 | 1.2891410048622 | | 1995 | 1.0986132511556 | | 1994 | 0.001719801980198 | | 1993 | 0.0034768571428571 | | 1992 | 0.00036571428571429 |
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