| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,100 | $16,926 |
| 2016 | $32,300 | $15,789 |
| 2017 | $32,900 | $22,636 |
| 2018 | $32,900 | $18,910 |
| 2019 | $33,500 | $17,389 |
| 2020 | $35,700 | $19,589 |
| 2021* | $36,350 | $18,273 |
| 2022* | $37,011 | $17,045 |
| 2023* | $37,685 | $15,899 |
| 2024* | $38,371 | $14,831 |
| 2025* | $39,069 | $13,834 |
