| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,557 | $12,270 |
| 2016 | $19,755 | $14,293 |
| 2017 | $20,539 | $15,051 |
| 2018 | $20,539 | $10,614 |
| 2019 | $21,739 | $14,939 |
| 2020 | $21,629 | $14,829 |
| 2021* | $22,488 | $15,615 |
| 2022* | $23,380 | $16,443 |
| 2023* | $24,309 | $17,314 |
| 2024* | $25,274 | $18,232 |
| 2025* | $26,277 | $19,198 |
