The conclusion was that there was no real evidence of a major problem, but perhaps some uncertainty remained. Now with GSOD data, which is available for Bolivia through to present, we can look again.
I'll do a side-by side GSOD-GHCN presentation. First is the anomaly plot and trend for a region within 1200 km of La Paz, since 1990. This can be calculated for both sets, even though GHCN has no data within the country.
GSOD Within 1200 km of La Paz
GHCN Within 1200 km of La Paz
Both plot and trend are similar. GHCN does a good job with the region, even lacking data within the country. Next is a plot of GSOD data from Bolivia data. There are no corresponding GHCN results, but it is quite similar to the GHCN result for the 1200 km circle.