| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,829 | $22,126 |
| 2016 | $34,771 | $22,739 |
| 2017 | $35,965 | $22,798 |
| 2018 | $35,965 | $22,170 |
| 2019 | $38,084 | $22,755 |
| 2020 | $39,164 | $23,835 |
| 2021* | $40,276 | $24,464 |
| 2022* | $41,420 | $25,110 |
| 2023* | $42,596 | $25,773 |
| 2024* | $43,806 | $26,453 |
| 2025* | $45,050 | $27,152 |