Year % 2010 10.3042245853242 2011 10.0198096087743 2012 10.0617315052563 2013 10.5828858705404 2014 10.3461877007788 2015 11.1088712350863 2016 12.5169417955011 2017 12.2573648738495 2018 11.8525493910472 2019 11.7003686980302 2020 12.4243332180722 2021 12.7048641937929