2011 - 13.1%

The 2011 13.1% is the baseline measurement.

2012 - 18.3%

The 2012 increase to 18.3% from 2011 represents a 5.2% increase YoY.

2013 - 15.1%

The 2013 decrease to 15.1% from 2012 represents a -3.2% decrease YoY.

2014 - 15.6%

The 2014 increase to 15.6% from 2013 represents a 0.5% increase YoY.

2015 - 13.7%

The 2015 decrease to 13.7% from 2014 represents a -1.9% decrease YoY.

2016 - 12.2%

The 2016 decrease to 12.2% from 2015 represents a -1.5% decrease YoY.

2017 - 10.8%

The 2017 decrease to 10.8% from 2016 represents a -1.4% decrease YoY.

2018 - 10.2%

The 2018 decrease to 10.2% from 2017 represents a -0.6% decrease YoY.

2019 - 10.5%

The 2019 increase to 10.5% from 2018 represents a 0.3% increase YoY.

2021 - 11.2%

The 2021 increase to 11.2% from 2019 represents a 0.7% increase YoY.

2022 - 10.2%

The 2022 decrease to 10.2% from 2021 represents a -1.0% decrease YoY.

2023 - 9.7%

The 2023 decrease to 9.7% from 2022 represents a -0.5% decrease YoY.