Complex sentence: As a result, the level of reserves in the National Interconnected System (SEIN) increased at average rates of 23.2% which, together with investment in transmission and distribution drove increases in coverage from 53% in 1993 to 76% in 2004.
Split into simpler sentences: As a result, the level of reserves in the National Interconnected System (SEIN) increased at average rates of 23.2%. Investments in transmission and distribution led to increases in coverage from 53% in 1993 to 76% in 2004.