Perhaps not exactly what you asked but here a few queries to tally questions and answers by tag:
- Number of questions and total score of these questions: http://data.stackexchange.com/travel/query/290643
- Number of questions, total number of answers to these questions and total scores of all answers: http://data.stackexchange.com/travel/query/290638
And here is one query combining them both: http://data.stackexchange.com/travel/query/290644