Japanese government monitors the price of pork every month. The following data show the changes in the price indexes of pork between 1970 and 2014, if the price in 2010 is taken as 2010. The price is getting higher slowly.
| Year | Index (2010 = 100) | Price of 100g pork loin (yen) |
| 1970 | 44.3 | 107 |
| 1971 | 45.6 | 110 |
| 1972 | 48.7 | 118 |
| 1973 | 55.5 | 134 |
| 1974 | 61.9 | 150 |
| 1975 | 75.8 | 183 |
| 1976 | 83.1 | 201 |
| 1977 | 80.5 | 195 |
| 1978 | 80.6 | 195 |
| 1979 | 78.6 | 190 |
| 1980 | 77.5 | 188 |
| 1981 | 82.2 | 199 |
| 1982 | 84.1 | 204 |
| 1983 | 86.8 | 210 |
| 1984 | 86.9 | 210 |
| 1985 | 85.9 | 208 |
| 1986 | 84.4 | 204 |
| 1987 | 82.9 | 201 |
| 1988 | 82.3 | 199 |
| 1989 | 83.3 | 202 |
| 1990 | 85.5 | 207 |
| 1991 | 87.6 | 212 |
| 1992 | 88.8 | 215 |
| 1993 | 88.3 | 214 |
| 1994 | 87 | 211 |
| 1995 | 87.1 | 211 |
| 1996 | 88.6 | 214 |
| 1997 | 93.3 | 226 |
| 1998 | 94.6 | 229 |
| 1999 | 94 | 227 |
| 2000 | 93.4 | 226 |
| 2001 | 93.4 | 226 |
| 2002 | 95.7 | 232 |
| 2003 | 96.4 | 233 |
| 2004 | 98 | 237 |
| 2005 | 98.7 | 239 |
| 2006 | 98.7 | 239 |
| 2007 | 99.2 | 240 |
| 2008 | 101.6 | 246 |
| 2009 | 101.1 | 245 |
| 2010 | 100 | 242 |
| 2011 | 100.3 | 243 |
| 2012 | 99.9 | 242 |
| 2013 | 100.1 | 242 |
| 2014 | 107.6 | 260 |
The next data show the changes in 100g pork loin price from 1970 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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