Year In the past month In the past week
2008 9%
2009 11%
2010 12%
2011 12%
2012 14%
2013 12% 7%
2014 15% 8%
2015 17% 10%
2016 21% 13%
2017 24% 15%
2018 26% 17%
2019 32% 22%
2020 37% 24%
2021 41% 28%