The 95th percentile of income line stops increasing relative to 1973 in the late 1990s. At that point it is 50 percent over 1973, but stops increasing. So income today for the 95th percentile is the same as in the late 1990s and thus the same percentage as over 1973.
This is useful to teach percentage concepts. Note the median and 20th percentile lines fell from the late 1990s.
High schools and colleges need to teach personal finance. For many students this means not going to college. For others it means scaling back to go to community college for 2 years and then complete at a 4 year college.
Community college is a good place to learn algebra II, trig, calculus, probability and statistics. In addition one can learn computer programming.