A Software Vulnerability Rating Approach Based on the Vulnerability Database

Table 5

Values of 𝑛(𝑡) and 𝐶(𝑡) from 2002 to 2012.

Year	𝑛(𝑡)	𝐶(𝑡)	Card(𝒱(𝑡))	Mean(𝐸(𝑣,𝑡))
2002	3	11.39	6662	3.2
2003	3	11.44	8157	2.8
2004	3	11.45	10796	2.7
2005	3	11.53	15409	2.7
2006	3	11.72	22389	2.6
2007	4	11.42	28823	3.1
2008	4	11.52	35808	3.1
2009	4	11.62	40655	3.1
2010	4	11.73	45516	3.1
2011	4	11.79	49724	3.0
2012	4	11.87	54432	2.9