It is possible to search number fields in the iSearch COVID-19 Portfolio, either for exact values (As you would search a phrase) or to search for a range of values. e.g. awarded dollars above an amount, publication years between two dates.
To search multiple years, place the minimum and maximum within square brackets and use 'TO'. e.g.:
pubYear:[2019 TO 2020]To search an open ended range e.g. everthing from 2019 onwards use an asterisk as a wild card. e.g.
pubYear:[2019 TO *]The correct format for date fields containing day and month as well as year is:
pubDate:[2020-01-01 TO 2020-01-31]