Viewership
| Season | Episodes | Launch | Viewers |
Finale | Viewers |
Duration | Viewers |
|---|---|---|---|---|---|---|---|
| Big Brother 1 | 70 | July 5, 2000 | 22.40 | September 29, 2000 | 11.13 | 88 | 9.10 |
| Big Brother 2 | 30 | July 5, 2001 | 8.20 | September 20, 2001 | 12.30 | 82 | 7.90 |
| Big Brother 3 | 32 | July 10, 2002 | 9.20 | September 25, 2002 | 12.94 | 82 | 8.70 |
| Big Brother 4 | 33 | July 8, 2003 | 9.69 | September 24, 2003 | 10.74 | 82 | 8.80 |
| Big Brother 5 | 31 | July 6, 2004 | 9.55 | September 21, 2004 | 10.40 | 82 | 8.30 |
| Big Brother 6 | 29 | July 7, 2005 | 8.47 | September 20, 2005 | 10.50 | 80 | 7.24 |
| Big Brother: All-Stars | 29 | July 6, 2006 | 7.69 | September 12, 2006 | 8.14 | 72 | 7.56 |
| Big Brother 8 | 33 | July 7, 2007 | 7.40 | September 16, 2007 | 8.51 | 81 | 7.52 |
| Big Brother 9 | 33 | February 12, 2008 | 7.33 | April 27, 2008 | 6.65 | 81 | 6.56 |
| Big Brother 10 | 29 | July 13, 2008 | 6.29 | September 16, 2008 | 7.63 | 71 | 6.72 |
| Big Brother 11 | 30 | July 9, 2009 | 6.59 | September 15, 2009 | 7.78 | 73 | 7.19 |
| Big Brother 12 | 30 | July 8, 2010 | 7.35 | September 15, 2010 | 7.89 | 75 | 7.76 |
| Big Brother 13 | 29 | July 7, 2011 | 7.89 | September 14, 2011 | 7.78 | 75 | 7.95 |
| Big Brother 14 | 30 | July 12, 2012 | 7.18 | September 19, 2012 | 7.39 | 75 | 6.79 |
Read more about this topic: Big Brother US