| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2014 | $23,709 | $16,941 |
| 2015 | $24,178 | $17,410 |
| 2016 | $24,659 | $18,478 |
| 2017 | $24,800 | $18,608 |
| 2018 | $24,800 | $16,366 |
| 2019 | $24,870 | $15,175 |
| 2020* | $25,012 | $15,281 |
| 2021* | $25,154 | $15,388 |
| 2022* | $25,298 | $15,496 |
| 2023* | $25,442 | $15,604 |
| 2024* | $25,587 | $15,714 |
