Table:
year
total youth crime severity index
youth violent crime severity index
youth non-violent crime severity index

index
percent change from previous year
index
percent change from previous year
index
percent change from previous year

2006
100.0
3
100.0
6
100.0
0

2007
101.5
1
102.1
2
101.0
1

2008
95.7
-6
95.7
-6
95.6
-5

2009
95.6
0
96.7
1
94.7
-1

2010
90.0
-6
93.2
-4
87.6
-8

2011
81.7
-9
87.4
-6
77.2
-12

2012
77.3
-5
82.2
-6
73.5
-5

2013
66.2
-14
71.3
-13
62.4
-15

2014
61.1
-8
65.3
-8
57.8
-7

2015r
61.3
0
67.4
3
56.8
-2

2016
60.1
-2
70.9
5
52.2
-8

percent change 2006 to 2016
-40
..
-29
..
-48
..

Statement: the youth crime severity index (youth csi), which measures both the volume and severity of crime involving youth accused (both charged and not charged), declined 2% in 2016.
Question: comparing to previous year, how many percentage point of the youth crime severity index has declined in 2016?
Answer: [2]