How to reduce table row height?

[animsaj]

I tried many things and they does not work. Table is on this page: http://nicolacoins.blogspot.bg

The problem appeared when I added this code:

<style>
#hovercolor{
    border-collapse:collapse;
}
#hovercolor tr {
    background-color:transparent;
}
#hovercolor tr:hover td  {
  background-color:#ceeca5;
}
#hovercolor tr td.link{
    background-color:transparent;
}
</style>

Please tell me how to reduce the height of the rows

[animsaj]

Any idea how to make rows with 100 pixels height?