| 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Households (thousands) | 1,550.6 | 1,573.0 | 1,592.9 | 1,615.5 | 1,642.6 | 1,675.9 | 1,675.7 | 1,741.0 | 1,742.7 | 1,811.5 | 1,793.6 | 1,820.1 | 1,840.0 | 1,842.0 | 1,844.0 | 1,867.0 | 1,896.0 | 1,950.0 | |
Households by Building Type (thousands) | |||||||||||||||||||
| Single Detached | 837.9 | 844.1 | 848.9 | 855.3 | 864.1 | 876.1 | 870.7 | 899.3 | 895.0 | 925.1 | 911.0 | 919.5 | 924.7 | 921.0 | 917.4 | 924.4 | 934.3 | 956.5 | |
| Single Attached | 161.9 | 166.7 | 171.3 | 176.1 | 181.4 | 187.3 | 189.6 | 199.2 | 201.6 | 211.7 | 211.7 | 216.9 | 221.3 | 223.6 | 225.7 | 230.4 | 235.9 | 244.4 | |
| Apartments | 493.5 | 504.4 | 514.5 | 525.4 | 537.7 | 552.1 | 555.4 | 580.4 | 584.3 | 610.7 | 607.8 | 619.9 | 629.7 | 633.4 | 637.0 | 647.8 | 660.6 | 682.3 | |
| Mobile Homes | 57.3 | 57.8 | 58.2 | 58.7 | 59.4 | 60.3 | 60.0 | 62.1 | 61.9 | 64.0 | 63.1 | 63.8 | 64.2 | 64.0 | 63.9 | 64.4 | 65.2 | 66.8 | |
Shares (%) | |||||||||||||||||||
| Single Detached | 54.0 | 53.7 | 53.3 | 52.9 | 52.6 | 52.3 | 52.0 | 51.7 | 51.4 | 51.1 | 50.8 | 50.5 | 50.3 | 50.0 | 49.8 | 49.5 | 49.3 | 49.1 | |
| Single Attached | 10.4 | 10.6 | 10.8 | 10.9 | 11.0 | 11.2 | 11.3 | 11.4 | 11.6 | 11.7 | 11.8 | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.4 | 12.5 | |
| Apartments | 31.8 | 32.1 | 32.3 | 32.5 | 32.7 | 32.9 | 33.1 | 33.3 | 33.5 | 33.7 | 33.9 | 34.1 | 34.2 | 34.4 | 34.5 | 34.7 | 34.8 | 35.0 | |
| Mobile Homes | 3.7 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | |
Households by Energy Source (thousands) | |||||||||||||||||||
| Electricity | 484.1 | 490.4 | 492.9 | 498.1 | 508.8 | 526.0 | 535.4 | 569.6 | 584.9 | 628.6 | 645.4 | 678.5 | 710.0 | 735.1 | 760.4 | 794.8 | 832.6 | 879.6 | |
| Natural Gas | 896.5 | 905.8 | 922.7 | 944.1 | 962.2 | 982.7 | 976.9 | 1,009.9 | 1,010.9 | 1,039.4 | 1,014.3 | 1,013.6 | 1,008.0 | 991.9 | 975.2 | 968.8 | 964.5 | 974.3 | |
| Heating Oil | 92.1 | 92.7 | 89.7 | 84.9 | 81.4 | 77.8 | 73.8 | 69.5 | 61.4 | 59.2 | 53.5 | 49.5 | 45.6 | 41.6 | 37.8 | 34.8 | 32.1 | 30.1 | |
| Other1 | 26.8 | 27.7 | 28.5 | 28.4 | 28.3 | 28.2 | 27.3 | 27.2 | 26.0 | 25.6 | 23.7 | 22.6 | 21.3 | 20.0 | 18.7 | 17.7 | 16.7 | 16.1 | |
| Wood | 51.2 | 56.5 | 59.2 | 60.0 | 61.9 | 61.1 | 62.3 | 64.7 | 59.5 | 58.8 | 56.7 | 56.0 | 55.0 | 53.4 | 51.9 | 50.9 | 50.1 | 49.8 | |
Shares (%) | |||||||||||||||||||
| Electricity | 31.2 | 31.2 | 30.9 | 30.8 | 31.0 | 31.4 | 32.0 | 32.7 | 33.6 | 34.7 | 36.0 | 37.3 | 38.6 | 39.9 | 41.2 | 42.6 | 43.9 | 45.1 | |
| Natural Gas | 57.8 | 57.6 | 57.9 | 58.4 | 58.6 | 58.6 | 58.3 | 58.0 | 58.0 | 57.4 | 56.6 | 55.7 | 54.8 | 53.8 | 52.9 | 51.9 | 50.9 | 50.0 | |
| Heating Oil | 5.9 | 5.9 | 5.6 | 5.3 | 5.0 | 4.6 | 4.4 | 4.0 | 3.5 | 3.3 | 3.0 | 2.7 | 2.5 | 2.3 | 2.1 | 1.9 | 1.7 | 1.5 | |
| Other1 | 1.7 | 1.8 | 1.8 | 1.8 | 1.7 | 1.7 | 1.6 | 1.6 | 1.5 | 1.4 | 1.3 | 1.2 | 1.2 | 1.1 | 1.0 | 0.9 | 0.9 | 0.8 | |
| Wood | 3.3 | 3.6 | 3.7 | 3.7 | 3.8 | 3.6 | 3.7 | 3.7 | 3.4 | 3.2 | 3.2 | 3.1 | 3.0 | 2.9 | 2.8 | 2.7 | 2.6 | 2.6 | |