Although it's not a perfect comparison (as it only counts top 10s), I did a quick calculation of the conversion from qualifying to race points (I excluded Williams, because Senna's 1550% badly skews the numbers).
Force India: 169%
Ferrari: 159%
Sauber: 138%
Lotus: 121%
Toro Rosso: 111%
Red Bull: 91%
McLaren: 80%
Mercedes: 65%