2011 - 17.1%

The 2011 17.1% is the baseline measurement.

2012 - 15.2%

The 2012 decrease to 15.2% from 2011 represents a -1.9% decrease YoY.

2013 - 13.3%

The 2013 decrease to 13.3% from 2012 represents a -1.9% decrease YoY.

2014 - 16.5%

The 2014 increase to 16.5% from 2013 represents a 3.2% increase YoY.

2015 - 12.9%

The 2015 decrease to 12.9% from 2014 represents a -3.6% decrease YoY.

2016 - 12.6%

The 2016 decrease to 12.6% from 2015 represents a -0.3% decrease YoY.

2017 - 12.2%

The 2017 decrease to 12.2% from 2016 represents a -0.4% decrease YoY.

2018 - 9.7%

The 2018 decrease to 9.7% from 2017 represents a -2.5% decrease YoY.

2019 - 11.2%

The 2019 increase to 11.2% from 2018 represents a 1.5% increase YoY.

2021 - 13.4%

The 2021 increase to 13.4% from 2019 represents a 2.2% increase YoY.

2022 - 10.4%

The 2022 decrease to 10.4% from 2021 represents a -3.0% decrease YoY.

2023 - 10.3%

The 2023 decrease to 10.3% from 2022 represents a -0.1% decrease YoY.