Provide a summary statistics table for all countries for the years from 1960 to 2020. Select 10 sample countries from the data (5 poor and 5 rich) and explain what important key historical or economic issues have happened during the years under consideration and how is this reflected in their per capita GDP, inflation, unemployment rate, and the policy measures in these countries during this time? Note, the major economic shocks to consider during this time could be financial crisis, pandemic, war, political instability, hyperinflation, etc.