Year Released

Product Version

Dev. Team Size

SLOC (Million)

Dev. Estimated Costs (Billion US Dollars)

Maint Estimated

Costs (Billion US Dollars)

Mar 1984

Debian 1.0

200

4 - 5

0.2

0.5

Apr 1994

Debian 1.1

450

7 - 8

0.3

0.7

Mar 1995

Debian 1.2

800

11 - 12

0.45

1.1

June 1996

Debian 1.3

1,400

29⁺

0.6

1.5

July 1998

Debian 2.0

1,800

45

0.8

1.9

March 1999

Debian 2.1

2,000

49

1.15

2.3

Jan 1999

Debian 2.2

2,500

55

1.4

4.0

July 2011

Debian 3.0

2,900

70

3.6

6.8

Oct 2011

Debian 3.1

3,100

215

4.3

10.4

April 2007

Debian 4.0

3,300

283

6.2

15.2

Feb 2009

Debian 5.0

3,500

324

8.1

20.1

Feb 2011

Debian 6.0

3,800

372

8.9

26.3

May 2013

Debian 7.0

4,200

419

10.2

28.1