1) The Illinois data contains variables FIPS, county name, unemployment rate for years
2003-2011, median household income, Percentage of state median HH income. 
Read this into a sas dataset.

2) delete observation 1

3) calculate the average unemployment rate for the state in 2010 and 2011

4) plot the average unemployment rate against years? explain the trend.

5) calculate the median income for the state