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.
Salary and Job Outlook. Interactive Map of Income and Job Growth Projections. Hover over any state to explore local income and job growth data. According to the US Bureau of Labor Statistics, the mean annual salary of pharmaceutical sales representatives is $86,750, and most earn between $52,280 and $149,010.