2011 - 14.8%

The 2011 14.8% is the baseline measurement.

2012 - 12.9%

The 2012 decrease to 12.9% from 2011 represents a -1.9% decrease YoY.

2013 - 15.2%

The 2013 increase to 15.2% from 2012 represents a 2.3% increase YoY.

2014 - 14.7%

The 2014 decrease to 14.7% from 2013 represents a -0.5% decrease YoY.

2015 - 15.6%

The 2015 increase to 15.6% from 2014 represents a 0.9% increase YoY.

2016 - 15.5%

The 2016 decrease to 15.5% from 2015 represents a -0.1% decrease YoY.

2017 - 15.1%

The 2017 decrease to 15.1% from 2016 represents a -0.4% decrease YoY.

2018 - 13.8%

The 2018 decrease to 13.8% from 2017 represents a -1.3% decrease YoY.

2019 - 12.1%

The 2019 decrease to 12.1% from 2018 represents a -1.7% decrease YoY.

2021 - 14.6%

The 2021 increase to 14.6% from 2019 represents a 2.5% increase YoY.

2022 - 11.5%

The 2022 decrease to 11.5% from 2021 represents a -3.1% decrease YoY.

2023 - 19.1%

The 2023 increase to 19.1% from 2022 represents a 7.6% increase YoY.