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.
An average Member Service Representative in the United States can expect to take home roughly $13.74 per hour. The range in cash compensation to Member Service Representatives (largely between $19K and $42K) includes potential earnings of $5K from bonuses, $3K from profit sharing, and commissions of $6K in exceptional cases.