2011 - 21.1%

The 2011 21.1% is the baseline measurement.

2012 - 22.2%

The 2012 increase to 22.2% from 2011 represents a 1.1% increase YoY.

2013 - 21.8%

The 2013 decrease to 21.8% from 2012 represents a -0.4% decrease YoY.

2014 - 20.6%

The 2014 decrease to 20.6% from 2013 represents a -1.2% decrease YoY.

2015 - 20%

The 2015 decrease to 20% from 2014 represents a -0.6% decrease YoY.

2016 - 16.3%

The 2016 decrease to 16.3% from 2015 represents a -3.7% decrease YoY.

2017 - 17.7%

The 2017 increase to 17.7% from 2016 represents a 1.4% increase YoY.

2018 - 20.5%

The 2018 increase to 20.5% from 2017 represents a 2.8% increase YoY.

2019 - 17.3%

The 2019 decrease to 17.3% from 2018 represents a -3.2% decrease YoY.

2021 - 19.8%

The 2021 increase to 19.8% from 2019 represents a 2.5% increase YoY.

2022 - 18.3%

The 2022 decrease to 18.3% from 2021 represents a -1.5% decrease YoY.

2023 - 21.3%

The 2023 increase to 21.3% from 2022 represents a 3.0% increase YoY.