Skip navigation

Illinois Municipal Price Index


The Illinois Municipal Price Index (MPI) was developed by the Illinois Institute for Rural Affairs at Western Illinois and is updated annually by Northern Illinois University's Center for Governmental Studies staff with assistance from the Illinois Municipal League. The MPI is designed to measure the increases in prices of goods and services purchased by Illinois municipalities.

Comparisons of the price and wage increases are shown for city expenditures as a whole and by major department so that users can determine the extent to which expenditures, in constant dollars, have changed through time. The MPI differs from other indices such as the Consumer Price Index (CPI) or the Producer Price Index (PPI) in that it is constructed based on purchasing patterns of cities rather than consumers or businesses. The MPI is a weighted aggregate of price relatives which means that the price or wage increases are weighted by the relative importance that each represents in the city or departmental budget.


Download the Excel (XLS) version of the following data.

Price Indices MPI CPI 1982-84=100.0 PPI 1982=100.0
Year 2000=100.0 All Items All Commodities All Services All Commodities
1990 68.1 130.7 122.8 139.2 116.3
1991 71.1 136.2 126.6 146.3 116.5
1992 73.9 140.3 129.1 152.0 117.2
1993 76.7 144.5 131.5 157.9 118.9
1994 79.3 148.2 133.8 163.1 120.4
1995 82.2 152.4 133.8 163.1 120.4
1996 86.0 156.9 139.9 174.1 127.7
1997 89.1 160.5 141.8 179.4 127.6
1998 91.9 163.0 141.9 184.2 124.4
1999 95.7 166.6 144.4 188.8 125.5
2000 100.0 172.2 149.2 195.3 132.7
2001 102.9 177.1 150.7 203.4 134.2
2002 105.9 179.9 149.7 209.8 131.1
2003 108.9 184.4 151.2 216.5 138.1
2004 113.4 188.9 154.7 222.8 146.7
2005 118.4 195.3 160.2 230.1 157.4
2006 123.2 201.6 164.0 238.9 164.7
2007 128.5 207.3 167.5 246.8 172.6
2008 134.7 215.3 174.8 255.5 189.6
2009 135.7 214.5 172.6 259.2 172.9
2010 137.8 218.1 174.6 261.3 184.7
2011 140.9 224.9 183.9 265.8 201.2
2012 144.1 229.6 187.6 271.4 202.2
2013 147.4 233.0 187.7 277.9 203.4
2014 150.6 236.7 187.9 285.1 205.3
2015 153.0 237.0 181.7 291.7 190.5
2016 158.4 240.0 179.2 299.9 185.4
Departmental Price Indices (2000=100.0)
Year General Control Economic Development Other Sanitation Health Water / Sewer Parks / Recreation Police Protection Fire Protection Streets Library
1990 61.9 N/A 70.5 61.0 73.8 69.6 66.5 66.9 68.9 64.4
1991 65.4 N/A 73.2 64.5 75.9 72.5 69.9 70.2 70.7 67.7
1992 68.4 N/A 75.6 67.9 77.8 75.2 73.1 73.2 72.7 71.2
1993 71.6 N/A 78.1 71.7 79.3 78.0 76.2 76.3 74.9 74.4
1994 74.5 N/A 80.6 75.3 82.4 80.7 78.9 79.4 76.9 77.8
1995 76.9 N/A 82.7 79.9 84.5 83.1 82.8 82.2 79.1 81.4
1996 81.2 N/A 87.7 84.0 87.6 86.1 86.4 85.5 83.8 86.1
1997 84.8 N/A 90.3 87.4 90.2 88.9 89.7 88.6 86.7 89.7
1998 90.4 N/A 92.3 90.8 92.4 91.7 92.9 92.5 89.1 89.9
1999 94.9 N/A 95.9 95.8 96.2 95.3 96.5 96.2 94.4 93.9
2000 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
2001 103.0 102.5 102.8 103.8 102.4 103.1 103.2 105.0 103.1 102.6
2002 107.3 106.0 106.1 108.1 105.4 106.5 105.9 107.4 105.4 106.0
2003 110.7 109.4 110.0 112.4 107.3 109.3 109.3 110.4 108.5 108.7
2004 114.2 113.2 115.2 115.6 112.9 114.5 111.9 112.7 113.6 113.7
2005 118.8 118.1 118.4 119.2 121.6 120.6 113.6 114.1 120.6 120.3
2006 124.2 123.4 123.0 123.0 131.0 126.3 117.4 117.2 127.6 122.6
2007 129.2 128.5 127.8 127.9 138.9 132.0 121.2 120.8 134.2 128.6
2008 135.5 134.7 134.1 133.1 146.7 139.1 125.9 125.4 141.9 135.2
2009 137.0 136.0 137.5 139.6 141.4 139.4 128.7 127.7 139.2 134.1
2010 139.6 137.7 140.7 143.1 140.5 143.0 130.8 129.4 141.3 134.7
2011 143.3 141.3 144.1 145.7 143.3 146.9 133.2 131.8 145.0 137.8
2012 146.3 144.3 147.3 148.9 146.7 150.6 136.2 134.6 148.5 141.1
2013 149.6 147.6 150.6 151.8 151.4 153.9 138.3 136.7 152.2 145.1
2014 153.2 150.7 153.6 154.7 156.4 157.0 140.8 139.0 155.9 148.9
2015 155.1 152.7 155.3 157.6 161.1 158.4 143.2 141.1 157.8 152.0
2016 160.1 157.2 159.6 161.3 166.1 163.3 145.3 143.8 163.0 157.5