.grouped_timeseries {
  figure.graph {
    clear: both;
  }
  #content & .more-info-link {
    margin-bottom: 14px;
  }
  svg { 
    min-height: 150px;
  }
}

.grouped_timeseries {
  figure.graph {
    clear: both;
  }
  #content & .more-info-link {
    margin-bottom: 14px;
  }
  svg {
    min-height: 150px;
    position: relative;
  }
  .inner {
    border-bottom: 2px solid $grey-2;
  }
}

Add grey baseline to grouped timeseries graphs
Add grey baseline to grouped timeseries graphs

Position relative is required to ensure that the graph lines appear in front of the baseline when ~0
