PARIS (Reuters) – Champagne sales reached an all-time high last year, handily beating a previous mark set in 2019, as the relaxation of pandemic-related curbs fueled a surge in exports, notably to the United States, producers said on Monday. While French producers already said last year they expected a sales record, they now confirmed 2021 sales hit $5.7 billion, 14% above the pre-pandemic high. Exports reached 180 million 0.75 litre bottles, up 37% from 2020 and 15% more than in 2019, while sales in France jumped 25% from the previous year to match 2019 sales at 140 million bottles, Union des…