The annual financial statements of Valley Vineyards, Inc. include the following footnote: Note 4. Property and Equipment Dec. 31, Year 2 Dec. 31, Year 1 Construction in progress $494,350 $530,512 Land 8,063,716 5,089.472 Winery buildings and hospitality center 14,458,309 13.756,320 Equipment 10,122,593 9,055,987 33,138,968 28.432291 Less accumulated depreciation (12,897,082) (11,654,901) $20.241.886 $16,777,390 Depreciation expense $1,379,901 51,313,610 The average useful life of Valley's depreciable assets at the end of its year is