NBA regular season tv rating:

Net.     Year     Rating
NBC     1996     5.0
NBC     1997     4.7
NBC     1998     4.6
NBC     1999     4.3
NBC     2000     3.3
NBC     2001     3.0
NBC     2002     N/A
ABC     2003     2.6
ABC     2004     2.4
ABC     2005     2.2
ABC     2006     2.2

Playoffs:
Net.↓     Year↓     Series↓     Rating↓
CBS     1976     Boston Celtics 4, Phoenix Suns 2     11.5
CBS     1977     Portland Trail Blazers 4, Philadelphia 76ers 2     12.7
CBS     1978     Washington Bullets 4, Seattle Supersonics 3     9.9
CBS     1979     Seattle Supersonics 4, Washington Bullets 1     7.2
CBS     1980     Los Angeles Lakers 4, Philadelphia 76ers 2     8.0
CBS     1981     Boston Celtics 4, Houston Rockets 2     6.7
CBS     1982     Los Angeles Lakers 4, Philadelphia 76ers 2     13.0
CBS     1983     Philadelphia 76ers 4, Los Angeles Lakers 0     12.3
CBS     1984     Boston Celtics 4, Los Angeles Lakers 3     12.3
CBS     1985     Los Angeles Lakers 4, Boston Celtics 2     13.7
CBS     1986     Boston Celtics 4, Houston Rockets 2     14.1
CBS     1987     Los Angeles Lakers 4, Boston Celtics 2     15.9
CBS     1988     Los Angeles Lakers 4, Detroit Pistons 3     15.4
CBS     1989     Detroit Pistons 4, Los Angeles Lakers 0     15.1
CBS     1990     Detroit Pistons 4, Portland Trail Blazers 1     12.3
NBC     1991     Chicago Bulls 4, Los Angeles Lakers 1     15.8
NBC     1992     Chicago Bulls 4, Portland Trail Blazers 2     14.2
NBC     1993     Chicago Bulls 4, Phoenix Suns 2     17.9
NBC     1994     Houston Rockets 4, New York Knicks 3     12.4
NBC     1995     Houston Rockets 4, Orlando Magic 0     13.9
NBC     1996     Chicago Bulls 4, Seattle Supersonics 2     16.7
NBC     1997     Chicago Bulls 4, Utah Jazz 2     16.8
NBC     1998     Chicago Bulls 4, Utah Jazz 2     18.7
NBC     1999     San Antonio Spurs 4, New York Knicks 1     11.3
NBC     2000     Los Angeles Lakers 4, Indiana Pacers 2     11.6
NBC     2001     Los Angeles Lakers 4, Philadelphia 76ers 1     12.1
NBC     2002     Los Angeles Lakers 4, New Jersey Nets 0     10.2
ABC     2003     San Antonio Spurs 4, New Jersey Nets 2     6.5
ABC     2004     Detroit Pistons 4, Los Angeles Lakers 1     11.5
ABC     2005     San Antonio Spurs 4, Detroit Pistons 3     8.2
ABC     2006     Miami Heat 4, Dallas Mavericks 2     8.5
ABC     2007     San Antonio Spurs 4, Cleveland Cavaliers 0     6.2
ABC     2008     Boston Celtics 4, Los Angeles Lakers 2     9.3
ABC     2009     Los Angeles Lakers 4, Orlando Magic 1     8.4
ABC     2010     Los Angeles Lakers 4, Boston Celtics 3     10.6