The findings come from the group's Industry Monitor for the first quarter of 2008, which reveal a fall in quantities across the board.
Volumes decreased 35% in daily newspapers, while Sunday newspapers and general magazines which decreased 28% and 31% respectively.
The council claim the figures were in line with its stance of reducing insert saturation and aiming to make them a more targeted medium.
Overall the Industry Monitor showed an annual decrease of 13% over the same period the previous year.
The figures did though reveal that inserts in Saturday and Sunday Supplements, which saw increases of 9% and 1% respectively.
Gurdev Singh, managing director at Howitt, said: "Budgets are being hit and people are being more selective with their advertising."
"At the same time, there is more data available to allow for a more targeted approach to campaigns while people are also becoming increasingly aware of multi-channelled means of advertising."
Jo Garcia, Chair of the Inserts Marketing Council added: "The insert market has seen increasing integration with other media channels, especially online while continuing complementary activity with traditional media."
DMA says inserts dropped an eighth in Q1 2008
Insert volumes have dropped 13% compared with the same period last year, according to the latest figures released by the Direct Marketing Association's Insert's Council.
