2011 - 19.5%

The 2011 19.5% is the baseline measurement.

2012 - 20.7%

The 2012 increase to 20.7% from 2011 represents a 1.2% increase YoY.

2013 - 18.9%

The 2013 decrease to 18.9% from 2012 represents a -1.8% decrease YoY.

2014 - 17.8%

The 2014 decrease to 17.8% from 2013 represents a -1.1% decrease YoY.

2015 - 17.9%

The 2015 increase to 17.9% from 2014 represents a 0.1% increase YoY.

2016 - 16.4%

The 2016 decrease to 16.4% from 2015 represents a -1.5% decrease YoY.

2017 - 15.5%

The 2017 decrease to 15.5% from 2016 represents a -0.9% decrease YoY.

2018 - 15%

The 2018 decrease to 15% from 2017 represents a -0.5% decrease YoY.

2019 - 15.3%

The 2019 increase to 15.3% from 2018 represents a 0.3% increase YoY.

2021 - 13.4%

The 2021 decrease to 13.4% from 2019 represents a -1.9% decrease YoY.

2022 - 14.6%

The 2022 increase to 14.6% from 2021 represents a 1.2% increase YoY.

2023 - 13%

The 2023 decrease to 13% from 2022 represents a -1.6% decrease YoY.