;2nd quarter 2018;Change in per cent;Change in per cent;1st quarter 2018;2nd quarter 2017;Breakdown of electricity sales by volume. Per cent; Last 3 mos.;Last 12 mos.; HOUSEHOLDS;44.6;4.9;34.7;42.5;33.1;100.0; New fixed-price contracts, 1-year or less, households;35.6;8.2;18.7;32.9;30.0;0.2; New fixed-price contracts, more than 1-year, households;34.2;23.9;11.8;27.6;30.6;0.1; Older fixed-price contracts, households;30.2;-0.7;-1.3;30.4;30.6;2.0; Contracts tied to spot price, households;43.6;3.3;37.1;42.2;31.8;72.1; Variable price contracts, households;48.5;9.2;32.9;44.4;36.5;25.7; SERVICES;40.8;4.6;38.8;39.0;29.4;100.0; New fixed-price contracts, services;30.8;7.3;10.8;28.7;27.8;0.8; Older fixed-price contracts, services;30.3;-5.6;3.4;32.1;29.3;7.2; Contracts tied to spot price, services;41.5;5.1;42.1;39.5;29.2;87.6; Variable price contracts, services;44.6;5.7;37.7;42.2;32.4;4.4; MANUFACTURING EXCL. ENERGY-INTENSIVE MANUFACTURING;39.9;3.4;36.6;38.6;29.2;100.0; New fixed-price contracts, manufacturing excl. energy-intensive manufacturing;38.0;24.2;23.8;30.6;30.7;0.5; Older fixed-price contracts, manufacturing excl. energy-intensive manufacturing;29.7;1.4;2.4;29.3;29.0;3.3; Contracts tied to spot price, manufacturing excl. energy-intensive manufacturing;40.2;3.1;39.1;39.0;28.9;93.5; Variable price contracts, manufacturing excl. energy-intensive manufacturing;44.4;4.2;37.5;42.6;32.3;2.6; ENERGY-INTENSIVE MANUFACTURING;30.9;-1.6;-1.6;31.4;31.4;100.0; Fixed-price contracts and contracts not entered in the market, energy-intensive manufacturing;:;:;:;:;:;:; Contracts tied to spot price, energy-intensive manufacturing;37.8;3.0;36.5;36.7;27.7;:;