|  | PCR genotyping | Sequencing | ||
---|---|---|---|---|---|
year of survey | No samples studied | No samples typed | No alleles detected | Mean No alleles detected/sample | No PCR fragments sequenced |
1990 | 23 | 23 | 46 | 2,00 | 27 |
1991 | 30 | 29 | 49 | 1,69 | 32 |
1992 | 30 | 29 | 43 | 1,48 | 33 |
1993 | 37 | 36 | 63 | 1,75 | 45 |
1994 | 35 | 34 | 54 | 1,59 | 37 |
1995 | 38 | 33 | 51 | 1,55 | 40 |
1996 | 46 | 38 | 68 | 1,79 | 48 |
1997 | 26 | 25 | 46 | 1,84 | 29 |
1998 | 52 | 44 | 76 | 1,73 | 51 |
1999 | 19 | 15 | 28 | 1,87 | 16 |