4.5 Cumulative change
To measure cumulative change, the index value for a given month is always compared with the value for December in the previous year.
For example, the cumulative change in the consumer price index in October 2002 is calculated as follows:
CPI 2000=100 index values for 2000-2003
| Month | 2001 | 2002 | 2003 |
| January | 100.89 | 103.19 | 104.59 |
| February | 101.51 | 103.35 | 105.28 |
| March | 102.06 | 103.90 | 105.57 |
| April | 102.53 | 104.33 | 105.44 |
| May | 103.21 | 104.56 | 105.31 |
| June | 103.20 | 104.34 | 105.19 |
| July | 102.43 | 104.15 | 104.64 |
| August | 102.75 | 104.15 | 104.78 |
| September | 103.49 | 104.53 | 105.21 |
| October | 103.26 | 104.80 | 105.10 |
| November | 102.80 | 104.47 | 105.00 |
| December | 102.76 | 104.46 | 105.09 |
| Average | 102.57 | 104.18 | 105.10 |
The cumulative change in the consumer price index in October 2002 is 2.0 per cent.
In December the cumulative change is equal to the 12-month change. Cumulative change rates shall always be compared with the cumulative changes in previous years. This allows us to compare the inflation profiles for different years. The Figure below shows the cumulative change in the consumer price index in January-December for 2001-2003.
| 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6 | 4.7 | 4.8 | 4.9 | 4.10 |
Home >
Products and services >
Online services >
eCourse in Statistics
> Indices > Using indices to perform calculations and to express change >
4.5 Cumulative change
- Module:
Indices - Lesson:
Using indices to perform calculations and to express change - Topic:
Cumulative change
Suomeksi
På svenska
Print version
Telephone +358 9 17 341