timestamp with vmstat

I currently have a cronjob that runs at the top of the hour for every hour =
of the day.  This cronjob calls a script to run vmstat once every 60 second=
s 59 times, and send output to a log file. This basically will run vmstat o=
nce per minute, for 59 minutes.

crontab

0 * * * * /runDirectory/vmstat_by_minute

Script "vmstat_by_minute" (summary, not exact syntax)
        -adds start time stamp      >> myTargetFile
        -executes vmstat 60 59      >> myTargetFile
        -adds Completion time stamp >> myTargetFile

Since this is run once/hour, I can time stamp the start and end,
but would like to time stamp each line (minute) of vmstat output.

Logfile output Example:
Begin vmstat running on ras2 at: 20080103_0000

Virtual Memory Statistics: (pagesize =3D 8192)
procs      memory        pages                            intr       cpu
r   w   u  act free wire fault  cow zero react pin pout  in  sy  cs us sy i=
d
10 937  54 300K 157K  47K    1G 110M 257M   921  98M  0  97  7K  3K  1  2 9=
7
 8 932  54 300K 157K  47K 31513 4999 6838     0 4095  0 113 10K  4K  1  4 9=
5
 9 931  54 300K 157K  47K 15170 1079 3388     0 1009  0  95  7K  3K  1  2 9=
7
.
.
.
8 927  54 300K 157K  47K 15099 1085 3401     0 1024   0  93  7K  3K  1  2 9=
7
V M S T A T  Server2  C O M P L E T E at: 20080103_0000

What I'd like is

Begin vmstat running on ras2 at: 20080103_0000

Virtual Memory Statistics: (pagesize =3D 8192)Virtual Memory Statistics: (p=
agesize =3D 8192)
procs      memory        pages        intr       cpu
Time    r   w   u  act free wire fault...in  sy  cs us sy id
01:01 10 937  54 300K 157K  47K  1G ...97  7K  3K  1  2 97
01:02 10 937  54 300K 157K  47K  1G ...97  7K  3K  1  2 97

Any suggestions would be greatly appreciated.

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Thank you, and please feel free to contact me by phone or email.

James Halte
Tacoma Power - T&D EMS Senior Engineer
Office: (253) 502-8094
Cell:    (253) 381-4088