2024 16 USC 460s-6 – Taxing power

2023 16 USC 460s-6 – Taxing power

2022 16 USC 460s-6 – Taxing power

2021 16 USC 460s-6 – Taxing power

2020 16 USC 460s-6 – Taxing power

2018 16 USC 460s-6 – Taxing power

2017 16 USC 460s–6 – Taxing power

2015 16 USC 460s–6 – Taxing power

2014 16 USC 460s-6 – Taxing power

2013 16 USC 460s-6 – Taxing power

2012 16 USC 460s-6 – Taxing power

2010 16 USC 460s-6 – Taxing power