Foreach statement only outputing the last server in the list.

The output is only bringing in the last server data.

Don't  know what i'm missing.

Clear-Host$machines=gcc:\temp\pcs.txtforeach ($machinein$machines){Get-HotFix-ComputerName$machine | where { $_.installedon -gt [datetime]'03/15/2015'}

| select-object pscomputername, description, hotfixid, installedon |Export-Csvc:\temp\pcpatching.csv-Append-NoTypeInformation
}