| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,650 | $17,006 |
| 2016 | $25,899 | $18,798 |
| 2017 | $26,137 | $20,693 |
| 2018 | $26,137 | $19,676 |
| 2019 | $27,505 | $19,900 |
| 2020 | $28,121 | $20,516 |
| 2021* | $28,394 | $21,152 |
| 2022* | $28,669 | $21,808 |
| 2023* | $28,947 | $22,484 |
| 2024* | $29,228 | $23,181 |
| 2025* | $29,512 | $23,899 |
