Set xp per level range e.g in dynamicxp.conf.
- Dynamic.XP.Rate.1-9 = 1.0
- Dynamic.XP.Rate.10-19 = 2.0
- Dynamic.XP.Rate.20-29 = 3.0
- Dynamic.XP.Rate.30-39 = 4.0
- Dynamic.XP.Rate.40-49 = 5.0
- Dynamic.XP.Rate.50-59 = 6.0
- Dynamic.XP.Rate.60-69 = 7.0
- Dynamic.XP.Rate.70-79 = 8.0