Ministry of Internal Affairs and Communications monitors the cost of professional gardening monthly.
The data below show the changes in the price indexes of gardening between 1980 and 2014, if the price in 2010 is taken as 100.
| Year | Index (2010 = 100) | Gardening charge (yen/day) |
| 1980 | 48.8 | 10368 |
| 1981 | 52.1 | 11069 |
| 1982 | 54.8 | 11642 |
| 1983 | 56.5 | 12003 |
| 1984 | 57.9 | 12301 |
| 1985 | 59.6 | 12662 |
| 1986 | 61.6 | 13087 |
| 1987 | 63.1 | 13406 |
| 1988 | 64.8 | 13767 |
| 1989 | 67.9 | 14425 |
| 1990 | 72.0 | 15296 |
| 1991 | 76.7 | 16295 |
| 1992 | 82.1 | 17442 |
| 1993 | 86.5 | 18377 |
| 1994 | 89.3 | 18972 |
| 1995 | 91.6 | 19460 |
| 1996 | 93.7 | 19907 |
| 1997 | 96.5 | 20501 |
| 1998 | 98.2 | 20863 |
| 1999 | 99.3 | 21096 |
| 2000 | 99.7 | 21181 |
| 2001 | 100.0 | 21245 |
| 2002 | 100.1 | 21266 |
| 2003 | 100.0 | 21245 |
| 2004 | 100.0 | 21245 |
| 2005 | 99.7 | 21181 |
| 2006 | 100.7 | 21394 |
| 2007 | 100.2 | 21287 |
| 2008 | 100.2 | 21287 |
| 2009 | 100.1 | 21266 |
| 2010 | 100.0 | 21245 |
| 2011 | 99.9 | 21224 |
| 2012 | 99.7 | 21181 |
| 2013 | 99.8 | 21203 |
| 2014 | 102.3 | 21734 |
The next graph shows the changes in the one day charge of gardening 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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