BNSF Railway’s net earnings rose 13.5 percent year-over-year from $2.97 billion in 2011 to $3.37 billion in 2012, Berkshire Hathaway reported.

Yearly revenue was $20.84 billion in 2012, increasing 6.6 percent from $19.55 billion in 2011.

BNSF will spend about $4 billion on the railroad in 2013, roughly double its depreciation charge, according to Berkshire Hathaway, owner of the railroad, in a written statement.

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