As altitude increases, the available amount of oxygen to sustain mental and physical alertness decreases with the overall air pressure, though the relative percentage of oxygen in air, at about 21%, remains practically unchanged up to 21,000 metres (70,000 ft).
  State legislators in Texas (both representatives and senators) make a salary of $7,200 per year.
A claims representative earns an average annual salary ranging from $39,576 to $57,637, according to 2011 data from Payscale.com's ongoing survey, the sample size of which is 2,148. Accounting for additional incentive payments, claims representatives can earn incomes as high as $42,069 to $65,641 per year.