| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2014 | $28,132 | $18,917 |
| 2015 | $28,640 | $19,425 |
| 2016 | $29,306 | $19,486 |
| 2017 | $30,682 | $20,359 |
| 2018 | $30,682 | $20,075 |
| 2019 | $33,180 | $20,202 |
| 2020* | $33,953 | $20,329 |
| 2021* | $34,744 | $20,457 |
| 2022* | $35,554 | $20,586 |
| 2023* | $36,382 | $20,716 |
| 2024* | $37,230 | $20,846 |
