Table 1 Distribution by year

Publication year	Frequency (%)
1994.01.01 - 1995.12.31	5 (%)
1996.01.01 - 2000.12.31	11 (%)
2001.01.01 - 2005.12.31	17 (%)
2006.01.01. - 2010.12.31	37 (%)
2011.01.01 - 2015.12.31	33 (%)
2016.01.01 - 2017.05.01	9 (%)
Total	112 (100%)