(Bloomberg) - Wine auctions by Chicago-based Hart Davis Hart Wine Co. rose 30 percent to $20 million in the first half of this year as demand persisted for top Bordeaux and Burgundy wines as well as rare Champagne.

A case of Chateau Lafite-Rothschild 1982 took the top slot at its most recent auction at the end of June, selling for $32,000, while a case of Dom Perignon Oenotheque 1969 Champagne fetched $24,000, according to a statement from Hart.

The sale raised a total $4.75 million as Hart rounded off its first-half auction season. The auction came as the Liv-ex Fine Wine 50 Index, a barometer of Bordeaux prices in the wider market, has risen 4 percent this year.

“I’m seeing good strength, better than we’ve seen in some time,” Paul Hart, the auctioneer’s chief executive officer, said by telephone from Chicago.

Other leading lots in the sale included 11 bottles of Clos de la Roche, Vieilles Vignes, Domaine Ponsot Burgundy which sold for $28,000 and 10 bottles of Barolo Riserva 1978 Monfortino Giacomo Conterno, which fetched $22,705.