2024 26 USC 193 – Tertiary injectants

2023 26 USC 193 – Tertiary injectants

2022 26 USC 193 – Tertiary injectants

2021 26 USC 193 – Tertiary injectants

2020 26 USC 193 – Tertiary injectants

2018 26 USC 193 – Tertiary injectants

2017 26 USC 193 – Tertiary injectants

2015 26 USC 193 – Tertiary injectants

2014 26 USC 193 – Tertiary injectants

2013 26 USC 193 – Tertiary injectants

2012 26 USC 193 – Tertiary injectants

2010 26 USC 193 – Tertiary injectants