| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,596 | $14,429 |
| 2016 | $20,112 | $13,137 |
| 2017 | $20,860 | $13,498 |
| 2018 | $20,860 | $14,725 |
| 2019 | $22,144 | $15,153 |
| 2020 | $22,202 | $15,211 |
| 2021* | $22,786 | $15,629 |
| 2022* | $23,385 | $16,059 |
| 2023* | $24,000 | $16,501 |
| 2024* | $24,631 | $16,955 |
| 2025* | $25,279 | $17,421 |
