| October 1, 1980 through September 30, 1981 |
10% |
| October 1, 1981 through December 31, 1994 |
12% |
| January 1, 1995 through December 31, 1995 |
8% |
| January 1, 1996 through December 31, 2000 |
10% |
| January 1, 2001 through December 31, 2001 |
11% |
| January 1, 2002 through December 31, 2002 |
9% |
| January 1, 2003 through December 31, 2003 |
6% |
| January 1, 2004 through December 31, 2005 |
7% |
| January 1, 2006 through December 31, 2006 |
9% |
| January 1, 2007 through December 31, 2008 |
11% |
| January 1, 2009 through December 31, 2009 |
8% |
| January 1, 2010 through September 30, 2011 |
6% |
| October 1, 2011 through March 31, 2016 |
4.75% |
| April 1, 2016 through June 30, 2016 |
4.78% |
| July 1, 2016 through September 30, 2016 |
4.84% |
| October 1, 2016 through December 31, 2016 |
4.91% |
| January 1, 2017 through March 31, 2017 |
4.97% |
| April 1, 2017 through June 30, 2017 |
5.05% |
| July 1, 2017 through September 30, 2017 |
5.17% |
| October 1, 2017 through December 31, 2017 |
5.35% |
| January 1, 2018 through March 31, 2018 |
5.53% |
| April 1, 2018 through June 30, 2018 |
5.72% |
| July 1, 2018 through September 30, 2018 |
5.97% |
| October 1, 2018 through December 31, 2018 |
6.09% |
| January 1, 2019 through March 31, 2019 |
6.33% |
| April 1, 2019 through June 30, 2019 |
6.57% |
| July 1, 2019 through September 30, 2019 |
6.77% |
| October 1, 2019 through December 31, 2019 |
6.89% |
| January 1, 2020 through March 31, 2020 |
6.83% |
| April 1, 2020 through June 30, 2020 |
6.66% |
| July 1, 2020 through September 30, 2020 |
6.03% |
| October 1, 2020 through December 31, 2020 |
5.37% |
| January 1, 2021 through March 31, 2021 |
4.81% |
| April 1, 2021 through June 30, 2021 |
4.31% |
| July 1, 2021 through June 30, 2022 |
4.25% |
| July 1, 2022 through September 30, 2022 |
4.34% |
| October 1, 2022 through December 31, 2022 |
4.75% |
| January 1, 2023 through March 31, 2023 |
5.52% |
| April 1, 2023 through June 30, 2023 |
6.58% |
| July 1, 2023 through September 30, 2023 |
7.69% |
| October 1, 2023 through December 31, 2023 |
8.54% |
| January 1, 2024 through March 31, 2024 |
9.09% |
| April 1, 2024 through June 30, 2024 |
9.34% |
| July 1, 2024 through September 30, 2024 |
9.46% |
| October 1, 2024 through December 31, 2024 |
9.50% |
| January 1, 2025 through March 31, 2025 |
9.38% |
| April 1, 2025 through June 30, 2025 |
9.15% |
| July 1, 2025 through September 30, 2025 |
8.90% |
| October 1, 2025 through December 31, 2025 |
8.65% |
| January 1, 2026 through March 31, 2026 |
8.44% |
| April 1, 2026 to present |
8.25% |