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.
How much does a Customer Service Representative I make? The median annual Customer Service Representative I salary is $33,418, as of March 31, 2017, with a range usually between $29,369-$38,150, however this can vary widely depending on a variety of factors.