| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,286 | $12,488 |
| 2016 | $18,421 | $11,890 |
| 2017 | $18,829 | $12,009 |
| 2018 | $18,829 | $11,947 |
| 2019 | $19,604 | $11,565 |
| 2020 | $21,152 | $13,113 |
| 2021* | $21,619 | $13,045 |
| 2022* | $22,097 | $12,977 |
| 2023* | $22,586 | $12,909 |
| 2024* | $23,085 | $12,842 |
| 2025* | $23,595 | $12,776 |
