fuel: 73.17%

hydro: 26.83%

nuclear: 0%

other: 0% (1999)

Samoa:
fossil fuel: 60%

hydro: 40%

nuclear: 0%

other: 0% (1999)

San Marino:
fossil fuel: NA%

hydro: NA%

nuclear: NA%

other: NA%

Sao Tome and Principe:
fossil fuel: 41.18%

hydro: 58.82%

nuclear: 0%

other: 0% (1999)

Saudi Arabia:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Senegal:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Seychelles:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Sierra Leone:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Singapore:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Slovakia:
fossil fuel: 37.56%

hydro: 18.27%

nuclear: 44.17%

other: 0% (1999)

Slovenia:
fossil fuel: 34.44%

hydro: 29.58%

nuclear: 35.98%

other: 0% (1999)

Solomon Islands:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

Somalia:
fossil fuel: 100%

hydro: 0%

nuclear: 0%

other: 0% (1999)

South Africa:
fossil fuel: 92.74%

hydro: 0.39%

nuclear: 6.87%

other: 0% (1999)

South Georgia and the South Sandwich Islands:
fossil fuel: NA%

hydro: NA%

nuclear: NA%

other: NA%

Spain:
fossil fuel: 57.71%

hydro: 12.1%

nuclear: 28.28%

other: 1.91% (1999)

Sri Lanka:
fossil fuel: 29.9%

hydro: 70.1%

nuclear: 0%

other: 0% (1999)

Sudan:
fossil fuel: 42.05%

hydro: 57.95%

nuclear: 0%

other: 0% (1999)

Suriname:
fossil fuel: 25.92%

hydro: 74.08%

nuclear: 0%

other: 0% (1999)

Svalbard:
fossil fuel: NA%

hydro: NA%

nuclear: NA%

other: NA%

Swaziland:
fossil fuel: 53.33%

hydro: 46.67%

nuclear: 0%

other: 0% (1999)

Sweden:
fossil fuel: 5.53%

hydro: 47.24%

nuclear: 45.42%

other: 1.81% (1999)

Switzerland:
fossil fuel: 3.44%

hydro: 59.16%

nuclear: 35.43%

other: 1.97% (1999)

Syria:
fossil fuel: 57.64%

hydro: 42.36%

nuclear: 0%

other: 0% (1999)

Tajikistan:
fossil fuel: 1.9%

hydro: 98.1%

nuclear: 0%

other: 0% (1999)

Tanzania:
fossil fuel: 22.24%

hydro: 77.76%

nucle