2011 - 15.6%

The 2011 15.6% is the baseline measurement.

2012 - 17.1%

The 2012 increase to 17.1% from 2011 represents a 1.5% increase YoY.

2013 - 14.8%

The 2013 decrease to 14.8% from 2012 represents a -2.3% decrease YoY.

2014 - 14.5%

The 2014 decrease to 14.5% from 2013 represents a -0.3% decrease YoY.

2015 - 14.7%

The 2015 increase to 14.7% from 2014 represents a 0.2% increase YoY.

2016 - 17.3%

The 2016 increase to 17.3% from 2015 represents a 2.6% increase YoY.

2017 - 17.9%

The 2017 increase to 17.9% from 2016 represents a 0.6% increase YoY.

2018 - 16.1%

The 2018 decrease to 16.1% from 2017 represents a -1.8% decrease YoY.

2019 - 16.8%

The 2019 increase to 16.8% from 2018 represents a 0.7% increase YoY.

2021 - 13.3%

The 2021 decrease to 13.3% from 2019 represents a -3.5% decrease YoY.

2022 - 12.2%

The 2022 decrease to 12.2% from 2021 represents a -1.1% decrease YoY.

2023 - 18.6%

The 2023 increase to 18.6% from 2022 represents a 6.4% increase YoY.