The average numbers of staff employed by the Group during the year, which includes Directors, were:

2017
Number
2016
Number
Manufacturing486417
Distribution109121
Administration743770
Total1,3381,308

The costs incurred in respect of these employees were:

2017
£000
2016
£000
Wages and salaries60,86944,331
Social security costs8,0396,748
Other pension costs4,3843,039
Share-based payments charge (see note 28)2,8252,386
Total76,11756,504

Related party transactions — the remuneration of key management was as follows:

2017
£000
2016
£000
Short term employee benefits5,1084,350
Post-employment benefits234251
Share-based payments charge1,6561,332
6,9985,933

Key management comprises the Board and the Senior Executive Team.

Details of the remuneration, shareholdings, share options, pension contributions and payments for loss of office of the Executive Directors are included in the Directors' Remuneration Report.

The Group operates a stakeholder personal pension scheme for certain employees and contributed between 4% and 14% of pensionable salaries. The Group also participates in state-run pension arrangements for certain employees in Dechra Veterinary Products SAS and Dechra Veterinary Products BV and operates defined benefit schemes in some countries. Total pension contributions amounted to £4,384,000 (2016: £3,039,000). Contributions to defined benefit pension schemes included in the above figures total £670,000 (2016: £581,000).