21. The data below show the number of families living in poverty (based on official governmental thresholds) in the United States for a selection of years from 1985 to 2015. Draw a time series graph for the data. Year 1985 1990 1995 2000 2005 2010 2015 Families in 7.2 7.1 7.5 6.4 9.4 18.6 poverty (Millions)