| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2014 | $13,322 | $7,961 |
| 2015 | $13,737 | $8,376 |
| 2016 | $14,103 | $8,349 |
| 2017 | $14,362 | $9,272 |
| 2018 | $14,362 | $9,083 |
| 2019 | $14,732 | $9,105 |
| 2020* | $15,112 | $9,127 |
| 2021* | $15,502 | $9,149 |
| 2022* | $15,902 | $9,171 |
| 2023* | $16,312 | $9,193 |
| 2024* | $16,733 | $9,215 |
