| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,542 | $13,171 |
| 2016 | $21,143 | $13,836 |
| 2017 | $21,854 | $14,538 |
| 2018 | $21,854 | $14,986 |
| 2019 | $23,903 | $16,280 |
| 2020 | $21,943 | $14,320 |
| 2021* | $22,586 | $15,043 |
| 2022* | $23,248 | $15,803 |
| 2023* | $23,929 | $16,601 |
| 2024* | $24,630 | $17,439 |
| 2025* | $25,352 | $18,320 |
