Marin’s annual crop and livestock report showed the county’s agricultural producers largely weathered the pandemic and drought, but the next few years could paint a different picture. The gross value of agricultural production last year went up by about 4 percent from the previous year, reaching almost $102 million. It was the first time the total value of Marin’s agricultural products surpassed $100 million since 2015, the year it reached a record high of over…