Year

Unique Codes Added

1

2006

1

2

1991

1

3

2004

1

4

2000

1

5

2017

1

6

2009

1

7

2008

2

8

2010

3

9

2018

3

10

2011

5

11

2013

9

12

2012

10

13

2016

11

14

2015

13

15

2014

15

16

1969

32

16 rows

109 total