Year | Value | 2021 | 54,204.424353528 | 2020 | 48,009.386203156 | 2019 | 57,484.496090266 | 2018 | 58,426.799150545 | 2017 | 58,236.91204845 | 2016 | 49,914.179365376 | 2015 | 42,267.312470042 | 2014 | 43,168.214106208 | 2013 | 39,104.098093158 | 2012 | 32,294.153175145 | 2011 | 32,094.720216853 |
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