Ministry of Internal Affairs and Communications has recorded the prices of a pack of milk sold in stores since 1975. The following data show the changes in the price indexes of milk from 1975 to 2014, if the price in 2010 is taken as 100. The price is raletively stable for 40 years.
| Year | Index (2010 = 100) | Price of 100ml milk (yen) |
| 1975 | 99 | 210 |
| 1976 | 108.2 | 229 |
| 1977 | 108.8 | 231 |
| 1978 | 110.8 | 235 |
| 1979 | 113.2 | 240 |
| 1980 | 112.5 | 239 |
| 1981 | 111.9 | 237 |
| 1982 | 110.6 | 234 |
| 1983 | 110 | 233 |
| 1984 | 109.5 | 232 |
| 1985 | 108.3 | 230 |
| 1986 | 107.6 | 228 |
| 1987 | 105.9 | 225 |
| 1988 | 105 | 223 |
| 1989 | 106.3 | 225 |
| 1990 | 106.5 | 226 |
| 1991 | 108.2 | 229 |
| 1992 | 108.8 | 231 |
| 1993 | 108.5 | 230 |
| 1994 | 107.5 | 228 |
| 1995 | 106.4 | 226 |
| 1996 | 105.4 | 223 |
| 1997 | 106.4 | 226 |
| 1998 | 106.2 | 225 |
| 1999 | 105.8 | 224 |
| 2000 | 104.4 | 221 |
| 2001 | 102.9 | 218 |
| 2002 | 102 | 216 |
| 2003 | 101.7 | 216 |
| 2004 | 100.8 | 214 |
| 2005 | 100.2 | 212 |
| 2006 | 99.2 | 210 |
| 2007 | 98.6 | 209 |
| 2008 | 101 | 214 |
| 2009 | 101.8 | 216 |
| 2010 | 100 | 212 |
| 2011 | 99.3 | 211 |
| 2012 | 98.5 | 209 |
| 2013 | 98.4 | 209 |
| 2014 | 103 | 218 |
The next graph shows the changes in 1000ml milk price from 1975 to 2014.
Source is Statistics Bureau. 消費者物価指数 (CPI) 結果
www.stat.go.jp/data/cpi/historic.htm
www.e-stat.go.jp/SG1/estat/Csvdl.do?sinfid=000011288549
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