| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,264 | $16,261 |
| 2016 | $24,028 | $15,107 |
| 2017 | $24,970 | $16,192 |
| 2018 | $24,970 | $15,811 |
| 2019 | $26,192 | $16,620 |
| 2020 | $27,248 | $17,676 |
| 2021* | $28,316 | $18,581 |
| 2022* | $29,426 | $19,532 |
| 2023* | $30,580 | $20,532 |
| 2024* | $31,778 | $21,584 |
| 2025* | $33,024 | $22,689 |