2011 - 16.4%

The 2011 16.4% is the baseline measurement.

2012 - 15.8%

The 2012 decrease to 15.8% from 2011 represents a -0.6% decrease YoY.

2013 - 18.3%

The 2013 increase to 18.3% from 2012 represents a 2.5% increase YoY.

2014 - 16.3%

The 2014 decrease to 16.3% from 2013 represents a -2.0% decrease YoY.

2015 - 17.5%

The 2015 increase to 17.5% from 2014 represents a 1.2% increase YoY.

2016 - 15.9%

The 2016 decrease to 15.9% from 2015 represents a -1.6% decrease YoY.

2017 - 16%

The 2017 increase to 16% from 2016 represents a 0.1% increase YoY.

2018 - 15.5%

The 2018 decrease to 15.5% from 2017 represents a -0.5% decrease YoY.

2019 - 17.4%

The 2019 increase to 17.4% from 2018 represents a 1.9% increase YoY.

2021 - 16.5%

The 2021 decrease to 16.5% from 2019 represents a -0.9% decrease YoY.

2022 - 15.1%

The 2022 decrease to 15.1% from 2021 represents a -1.4% decrease YoY.

2023 - 14.6%

The 2023 decrease to 14.6% from 2022 represents a -0.5% decrease YoY.