Ministry of Internal Affairs and Communications monitors the price of eating out at a restaurant monthly.
The data below show the changes in the price indexes of eating spaghetti out at a restaurant between 1980 and 2014, if the price in 2010 is taken as 100.
| Year | Index (2010 = 100) | Price of a dish of spaghetti (yen) |
| 1980 | 61.5 | 430 |
| 1981 | 64.4 | 450 |
| 1982 | 66.2 | 463 |
| 1983 | 68.2 | 477 |
| 1984 | 71.5 | 500 |
| 1985 | 73.0 | 510 |
| 1986 | 74.1 | 518 |
| 1987 | 74.9 | 524 |
| 1988 | 75.6 | 528 |
| 1989 | 79.5 | 556 |
| 1990 | 82.1 | 574 |
| 1991 | 85.4 | 597 |
| 1992 | 88.7 | 620 |
| 1993 | 90.7 | 634 |
| 1994 | 92.7 | 648 |
| 1995 | 93.3 | 652 |
| 1996 | 93.8 | 656 |
| 1997 | 95.7 | 669 |
| 1998 | 96.9 | 677 |
| 1999 | 97.4 | 681 |
| 2000 | 97.2 | 679 |
| 2001 | 97.6 | 682 |
| 2002 | 97.7 | 683 |
| 2003 | 97.1 | 679 |
| 2004 | 97.4 | 681 |
| 2005 | 97.8 | 684 |
| 2006 | 98.2 | 686 |
| 2007 | 98.5 | 689 |
| 2008 | 100.0 | 699 |
| 2009 | 100.3 | 701 |
| 2010 | 100.0 | 699 |
| 2011 | 99.9 | 698 |
| 2012 | 99.9 | 698 |
| 2013 | 99.8 | 698 |
| 2014 | 102.5 | 716 |
The next graph shows the changes in the price of a dish of spaghetti from 1980 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=000011288564
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