2011 - 13.9%

The 2011 13.9% is the baseline measurement.

2012 - 15%

The 2012 increase to 15% from 2011 represents a 1.1% increase YoY.

2013 - 12.5%

The 2013 decrease to 12.5% from 2012 represents a -2.5% decrease YoY.

2014 - 13.1%

The 2014 increase to 13.1% from 2013 represents a 0.6% increase YoY.

2015 - 15.5%

The 2015 increase to 15.5% from 2014 represents a 2.4% increase YoY.

2016 - 10.5%

The 2016 decrease to 10.5% from 2015 represents a -5.0% decrease YoY.

2017 - 12%

The 2017 increase to 12% from 2016 represents a 1.5% increase YoY.

2018 - 9.3%

The 2018 decrease to 9.3% from 2017 represents a -2.7% decrease YoY.

2019 - 7.4%

The 2019 decrease to 7.4% from 2018 represents a -1.9% decrease YoY.

2021 - 9.3%

The 2021 increase to 9.3% from 2019 represents a 1.9% increase YoY.

2022 - 9.4%

The 2022 increase to 9.4% from 2021 represents a 0.1% increase YoY.

2023 - 9.1%

The 2023 decrease to 9.1% from 2022 represents a -0.3% decrease YoY.