Total published items, total citations and Hirsch h-index for researchers with different patterns of publishing presence in the scientific literature, 1996–2011.

The definitions of the 4 groups are: UCP – authors publishing in all 16 years (1996–2011); Non-UCP – authors not publishing in all 16 years (1996–2011); Skip – authors who skipped any of the 16 year(s), excepting those who have published consecutively for two or more years in the beginning of the 1996–2011 period but not after that, and those who published for two or more years at the end of this period but not before that; Skip-1– authors publishing in 15 of the 16 years, with the skipped year between 1997–2010.
The shown total cites and H-index are the average total cites and H-index for each centile in the respective group.