Adjustment of manufacturing production index

A number of – partly methodological - adjustments have been made to the manufacturing production indices from July 2003 onwards The effects of these adjustments have been incorporated in recalculations of previously released figures up to July 2003. The new recalculated series are given below, and is also be available in Statistics Netherlands’ database StatLine on the website.

Three factors underlie the adjustment of the figures:

  • The annual adjustment to the new National Accounts. The development of value added according to the National Accounts 2002 has been incorporated in the manufacturing production index.
  • The introduction of a new calculation method for working day and seasonal correction and the annual calculation of seasonal factors. The new method makes it possible to take better account of production differences between working days of the annual shifts in the staggering of summer holiday periods. Up to now the staggered holidays have made the interpretation of year-on-year changes in July and August difficult for a number of regionally concentrated sectors of industry.
  • The base shift to 2000=100. Base shifts take place every five years, and at the same time the weights of the various sectors in total manufacturing are updated. In the new series the metal industry has been assigned a larger weight, while the petroleum, chemical and rubber industry has been given a smaller weight than in the previous series.

Statistics Netherlands has recalculated the manufacturing production index figures for the period January 1995 to June 2003. The adjusted manufacturing production figures are presented in the two tables below.

Table 1: Volume indices of manufacturing production (2000=100), average daily production
  1995 1996 1997 1998 1999 2000 2001 2002 2003
January 83.6 82.0 83.0 92.0 90.2 93.0 93.3 91.2 90.6
February 85.4 84.2 87.4 92.2 90.5 97.6 99.4 96.4 96.5
March 88.8 89.6 91.3 96.7 97.8 102.1 103.6 102.0 100.8
April 85.8 88.3 90.4 93.4 94.4 99.0 100.4 100.0 97.9
 
May 91.2 91.0 92.8 96.7 96.9 103.4 103.0 101.0 100.3
June 90.1 91.1 93.2 95.6 98.0 103.1 103.5 101.7 99.4
July 82.0 83.5 84.2 87.8 89.6 93.4 94.3 91.4   
August 80.5 81.3 83.5 83.9 86.7 90.1 88.2 87.1   
 
September 92.9 94.5 96.6 96.9 100.4 104.5 101.3 101.5   
October 95.3 96.0 99.1 100.3 103.5 107.5 102.1 101.7   
November 94.6 94.7 98.3 98.1 103.7 106.8 103.3 103.0   
December 87.4 87.7 89.9 89.1 97.7 99.9 96.7 93.4   
 
Year 88.1 88.6 90.8 93.6 95.8 100.0 99.1 97.5   

Table 2: Volume indices of manufacturing production (2000=100), average daily production corrected for seasonal effects
  1995 1996 1997 1998 1999 2000 2001 2002 2003
January 87.5 86.2 87.9 97.6 95.9 99.0 99.8 97.7 97.4
February 87.6 86.2 89.3 93.8 91.7 98.7 100.6 97.7 97.6
March 87.3 88.0 89.4 94.2 94.9 98.8 100.2 98.4 97.1
April 85.2 88.0 90.4 93.6 94.5 99.1 100.2 99.4 97.1
May 88.9 88.6 90.4 94.0 94.2 100.3 99.9 97.8 96.9
 
June 87.2 88.6 91.0 93.2 95.2 99.7 99.9 98.2 96.0
July 88.4 89.5 90.1 93.8 95.7 99.8 100.7 97.5  
August 88.8 89.5 92.2 93.0 96.3 100.4 98.5 97.4  
September 89.2 90.5 92.6 93.2 96.7 100.8 97.7 97.8  
 
October 89.0 89.6 92.5 93.9 97.1 101.2 96.6 96.5  
November 89.3 89.4 92.8 92.7 98.0 100.9 97.7 97.3  
December 88.8 89.1 91.4 90.4 99.0 101.3 98.2 95.1  
 
Year 88.1 88.6 90.8 93.6 95.8 100.0 99.1 97.5