2011 - 18.6%

The 2011 18.6% is the baseline measurement.

2012 - 20.3%

The 2012 increase to 20.3% from 2011 represents a 1.7% increase YoY.

2013 - 20.7%

The 2013 increase to 20.7% from 2012 represents a 0.4% increase YoY.

2014 - 18.3%

The 2014 decrease to 18.3% from 2013 represents a -2.4% decrease YoY.

2015 - 20.1%

The 2015 increase to 20.1% from 2014 represents a 1.8% increase YoY.

2016 - 16.7%

The 2016 decrease to 16.7% from 2015 represents a -3.4% decrease YoY.

2017 - 14.4%

The 2017 decrease to 14.4% from 2016 represents a -2.3% decrease YoY.

2018 - 13.2%

The 2018 decrease to 13.2% from 2017 represents a -1.2% decrease YoY.

2019 - 15.3%

The 2019 increase to 15.3% from 2018 represents a 2.1% increase YoY.

2021 - 11.2%

The 2021 decrease to 11.2% from 2019 represents a -4.1% decrease YoY.

2022 - 12.6%

The 2022 increase to 12.6% from 2021 represents a 1.4% increase YoY.

2023 - 12.1%

The 2023 decrease to 12.1% from 2022 represents a -0.5% decrease YoY.