The period up to 2011 shows fluctuations in the amount of R&D personnel which are primarily caused by fluctuations in the business sector. Higher education shows more regular increments in the number of R&D personnel employed, while the R&D personnel at research institutes also fluctuates somewhat.
The share of researchers has increased in all sectors between 2000 and 2015. The growth in the share of researchers is the largest in the business sector. Growth of this share in the higher education sector is rather gradual. The other two sectors experienced more erratic growth in the share of researchers, in particular the business sector. Between 2014 and 2015 the share of researchers increases a bit at the research institutes.