When I try to get "Dot Plot" related data from ALFRED with vintage_all = fred.get_series_all_releases('FEDTARMD') the output seems off. For example for the median federal funds rate projection for the FOMC meeting 2017-03-15, we should get three datapoints: 2017: 1.4, 2018: 2.1, 2019: 3.0, which is what you get when you download all vintages for 'FEDTARMD' into a zipped excel from ALFRED. But for some reason the api call gives me a NaN for 2016 and 3 for 2019, both these values are fine, but 2017 and 2018 projections are missing. Either I'm doing something wrong or the api call does not handle this data output correctly.