11.7 - STEREO, PORTABLE MEDIA DEVICES AND SMART PHONES
  Number of households by size of household
Two members Three members Four or more members Not stated
Households with a component stereo
Yes 1,980,118 A 1,124,947 A 1,648,963 A 349,069 M
No 1,954,244 A 803,670 A 1,214,911 A 312,921 M
Not stated 486,282 A 143,550 M 200,413 M 163,729 M
Number of component stereos
One 1,782,348 A 1,001,447 A 1,452,144 A 334,950 M
Two or more 197,769 A 123,500 M 196,819 M U
Don't know U U U U
Not stated 465,038 A 122,653 M 172,510 M 163,075 M
Age of the most frequently used component stereo
5 years or less 580,671 A 361,240 A 607,216 A U
6 to 10 years 676,778 A 317,346 A 547,974 A U
11 years or more 623,793 A 363,688 A 412,607 A U
Don't know U U U U
Not stated 545,659 A 208,462 A 237,755 M 205,048 M
Households with an ENERGY STAR® qualified component stereo (most frequently used component stereo)
Yes 325,073 A 172,996 M 298,501 M U
No 810,711 A 435,429 A 648,908 A U
Don't know 586,399 A 373,922 A 539,292 A U
Not stated 744,216 A 286,150 M 362,676 A 219,822 M
Use of the most frequently used component stereo in an average week
4 hours or less 1,206,569 A 631,847 A 1,136,728 A 227,034 M
5 to 10 hours 286,054 A 244,876 M 230,177 A U
11 or more 294,513 A 166,356 M 165,595 A U
Don't know U U U U
Not stated 637,690 A 172,137 A 270,711 M 252,247 M
Households with portable media and smart phones
Yes 2,185,177 A 1,526,765 A 2,592,150 A 489,926 M
No 1,664,918 A 408,551 A 329,974 A 179,420 M
Not stated 570,548 A 136,851 M U 156,373 M
Number of portable media and smart phones
One 897,074 A 544,119 A 440,678 A 224,763 M
Two 651,497 A 503,138 A 798,595 A U
Three or more 636,606 A 479,507 A 1,352,877 A U
Don't know U U U
Not stated 534,579 A 104,312 M U 156,373 M
Age of the most frequently used portable media and smart phones
5 years or less 1,975,193 A 1,473,216 A 2,485,434 A 409,922 M
6 years or more U U 77,599 M U
Don't know U U U U
Not stated 642,352 A 114,482 M 163,038 M 211,552 M
Households with an ENERGY STAR® qualified portable media and smart phones (most frequently used)
Yes 598,773 A 496,226 A 791,007 A U
No 355,136 M 162,718 M 249,063 A U
Don't know 1,002,931 A 850,547 A 1,452,693 A 283,835 M
Not stated 798,885 A 154,126 M 241,551 M 237,586 M
Use of the most frequently used portable media and smart phones in an average week
4 hours or less 822,902 A 443,487 A 642,183 A U
5 to 10 hours 414,994 A 366,172 A 511,273 A U
11 or 20 hours 209,411 M 185,605 M 350,536 A U
21 or 30 hours 76,685 M 72,513 M 217,658 M U
31 or 40 hours 106,866 M U 146,686 M U
41 or more hours 371,872 M 333,899 M 466,358 A U
Don't know 98,839 M 85,659 M 243,568 M U
Not stated 654,156 A 100,084 M 156,051 M 212,274 M

Note:

Due to rounding, the numbers may not add up and may differ slightly among tables.

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Source:

2011 Survey of Household Energy Use