| Month | Year | Fiscal year | Elsevier ScienceDirect | Springer | Wiley InterScience | Blackwell Synergy | Web of Science (Records saved, emailed, & printed) | EBSCOhost Web | IEEE/IEE | ACS | OUP | Cambridge UP Journals | JSTOR | ProQuest Historical Newspapers (database; full-text requests) | Gale 18th Century Collections Online (ECCO) | Project MUSE |
| July | 2005 | 05/06 | $1.86 | $3.77 | $0.14 | $0.42 | $0.21 | $2.47 | $0.44 | $0.51 | $0.15 | $1.72 | $17.20 | $1.17 | ||
| August | 2005 | 05/06 | $2.37 | $3.79 | $0.14 | $1.11 | $0.41 | $2.81 | $0.43 | $2.13 | $0.22 | $2.20 | $5.14 | $1.02 | ||
| September | 2005 | 05/06 | $2.00 | $3.21 | $0.11 | $0.55 | $0.14 | $1.80 | $0.32 | $0.39 | $0.07 | $0.58 | $6.85 | $0.49 | ||
| October | 2005 | 05/06 | $1.92 | $3.14 | $0.09 | $0.50 | $0.10 | $1.97 | $0.35 | $1.17 | $0.06 | $0.87 | $3.56 | $0.35 | ||
| November | 2005 | 05/06 | $1.89 | $3.00 | $0.10 | $0.71 | $0.10 | $1.78 | $0.32 | $0.33 | $0.05 | $1.10 | $3.08 | $0.38 | ||
| December | 2005 | 05/06 | $2.77 | $4.24 | $0.15 | $0.78 | $0.27 | $2.82 | $0.49 | $0.57 | $0.10 | $1.62 | $9.01 | $0.40 | ||
| January | 2006 | 05/06 | $2.15 | $6.13 | $2.80 | $0.11 | $0.52 | $0.24 | $2.25 | $0.41 | $0.37 | $3.72 | $0.11 | $1.08 | $6.13 | $0.58 |
| February | 2006 | 05/06 | $2.05 | $5.48 | $2.60 | $0.09 | $0.57 | $0.13 | $2.07 | $0.39 | $0.36 | $3.43 | $0.06 | $0.96 | $4.37 | $0.47 |
| March | 2006 | 05/06 | $1.98 | $5.13 | $2.66 | $0.10 | $0.64 | $0.14 | $1.59 | $0.39 | $0.33 | $2.86 | $0.05 | $0.72 | $11.68 | $0.42 |
| April | 2006 | 05/06 | $2.09 | $5.47 | $2.61 | $0.10 | $0.60 | $0.14 | $2.08 | $0.38 | $0.31 | $2.97 | $0.04 | $0.30 | $7.29 | $0.41 |
| May | 2006 | 05/06 | $2.14 | $6.38 | $2.99 | $0.13 | $1.20 | $0.32 | $2.20 | $0.40 | $0.39 | $3.32 | $0.12 | $0.47 | $7.33 | $0.72 |
| June | 2006 | 05/06 | $2.18 | $5.95 | $2.81 | $0.13 | $1.01 | $0.25 | $2.44 | $0.45 | $0.37 | $3.45 | $0.12 | $0.90 | $55.37 | $0.65 |
| July | 2006 | 06/07 | $2.56 | $6.41 | $2.84 | $0.14 | $0.77 | $0.24 | $2.30 | $0.44 | $0.42 | $3.44 | $0.12 | $0.84 | $13.19 | $0.86 |
| August | 2006 | 06/07 | $2.35 | $7.69 | $2.72 | $0.12 | $1.17 | $0.23 | $2.21 | $0.43 | $0.38 | $4.30 | $0.14 | $1.86 | $9.74 | $0.60 |
| September | 2006 | 06/07 | $2.11 | $7.09 | $2.38 | $0.09 | $0.58 | $0.11 | $2.05 | $0.33 | $0.30 | $2.66 | $0.06 | $1.71 | $9.25 | $0.48 |
| October | 2006 | 06/07 | $1.86 | $5.90 | $2.06 | $0.08 | $0.60 | $0.07 | $1.43 | $0.34 | $0.29 | $1.78 | $0.04 | $0.86 | $3.25 | $0.36 |
| November | 2006 | 06/07 | $1.97 | $6.23 | $2.25 | $0.08 | $0.89 | $0.06 | $1.63 | $0.36 | $0.28 | $1.59 | $0.04 | $0.82 | $4.71 | $0.30 |
| December | 2006 | 06/07 | $2.83 | $9.25 | $3.25 | $0.13 | $1.64 | $0.14 | $2.24 | $0.52 | $0.44 | $2.38 | $0.07 | $1.86 | $9.87 | $0.42 |
| January | 2007 | 06/07 | $2.12 | $5.71 | $2.51 | $1.36 | $0.96 | $0.12 | $1.85 | $0.50 | $0.91 | $3.63 | $0.12 | $2.83 | $4.95 | $0.69 |
| February | 2007 | 06/07 | $1.92 | $4.38 | $2.18 | $1.17 | $0.42 | $0.06 | $1.69 | $0.47 | $0.78 | $2.99 | $0.07 | $1.05 | $8.57 | $0.53 |
| March | 2007 | 06/07 | $1.83 | $4.77 | $2.12 | $1.07 | $0.79 | $0.07 | $1.57 | $0.42 | $0.80 | $2.76 | $0.06 | $0.16 | $7.74 | $0.46 |
| April | 2007 | 06/07 | $1.91 | $4.93 | $2.07 | $1.05 | $0.61 | $0.05 | $1.52 | $0.37 | $0.92 | $2.45 | $0.04 | $0.37 | $11.05 | $0.39 |
| May | 2007 | 06/07 | $1.95 | $4.81 | $2.53 | $1.49 | $1.54 | $0.15 | $1.91 | $0.49 | $1.02 | $3.33 | $0.16 | $1.95 | $8.25 | $1.05 |
| June | 2007 | 06/07 | $1.99 | $5.09 | $2.57 | $1.57 | $1.81 | $0.13 | $2.28 | $0.54 | $1.13 | $2.47 | $0.14 | $2.69 | $8.95 | $1.00 |
| July | 2007 | 07/08 | $2.18 | $4.39 | $1.56 | $2.57 | $1.04 | $2.79 | ||||||||
| August | 2007 | 07/08 | $2.10 | $5.09 | $1.57 | $2.73 | $4.26 | |||||||||
| September | 2007 | 07/08 | $1.82 | $4.60 | $1.16 | $2.38 | $2.28 | |||||||||
| October | 2007 | 07/08 | $1.41 | $3.54 | $0.98 | $1.73 | $1.61 | |||||||||
| November | 2007 | 07/08 | $1.68 | $3.98 | $1.22 | $2.55 | $1.60 | |||||||||
| December | 2007 | 07/08 | $2.32 | $6.22 | $1.47 | $3.33 | $2.47 | |||||||||
| January | 2008 | 07/08 | $1.50 | $4.80 | ||||||||||||