Table 1:
Increase with time of the number of known QSOs,
BL Lacs and Seyfert 1s.
| QSO |
BL Lac |
Seyfert 1 |
reference |
| 202 |
|
|
De Veny et al. (1971) |
| 2251 |
|
190 |
Véron-Cetty & Véron (1984) |
| 2835 |
73 |
236 |
Véron-Cetty & Véron (1985) |
| 3473 |
84 |
258 |
Véron-Cetty & Véron (1987) |
| 4169 |
117 |
358 |
Véron-Cetty & Véron (1989) |
| 6225 |
162 |
575 |
Véron-Cetty & Véron (1991) |
| 7383 |
171 |
695 |
Véron-Cetty & Véron (1993) |
| 8609 |
220 |
888 |
Véron-Cetty & Véron (1996a) |
| 11 358 |
357 |
1111 |
Véron-Cetty & Véron (1998) |
| 13 214 |
462 |
1711 |
Véron-Cetty & Véron (2000a) |
| 23 760 |
608 |
2765 |
Véron-Cetty & Véron (2001) |
| 48 921 |
876 |
11 777 |
Véron-Cetty & Véron (2003) |
| 85 221 |
1122 |
9628 |
Present edition |