Table:
depreciation rate
expected life

ex post simultaneous estimation
ex ante declining-balance rate from simultaneous estimation
ex post simultaneous estimation
ex ante survey

rate
years

asset description and code

office furniture, furnishing
0.227
0.275
9.2
7.6

computers, associated hardware and word processors
0.431
0.430
4.9
4.9

non-office furniture, furnishings and fixtures
0.240
0.293
9.7
7.9

scientific, professional and medical devices
0.189
0.243
11.1
8.6

heating, electrical, plumbing, air conditioning and refrigeration equipment
0.130
0.161
16.8
13.5

pollution abatement and control equipment
0.125
0.167
16.8
12.5

motors, generators, transformers, turbines, compressors and pumps of all types
0.103
0.112
20.3
18.8

heavy construction equipment
0.157
0.285
14.4
7.9

tractors of all types and other field equipment
0.170
0.322
13.6
7.2

capitalized tooling and other tools
0.229
0.309
10.2
7.5

drilling and blasting equipment
0.156
0.182
14.2
12.1

automobiles and major replacement parts
0.279
0.495
7.5
4.2

buses (all types) and major replacement parts
0.103
0.170
22.0
13.4

trucks, vans, truck tractors, truck trailers and major replacement parts
0.201
0.304
10.5
6.9

other transportation equipment
0.162
0.279
13.0
7.5

computer-assisted processing machinery and equipment
0.134
0.177
15.6
11.8

non-computer-assisted processing machinery and equipment
0.125
0.190
16.7
11.0

communication and related equipment
0.201
0.233
10.4
9.0

safety and security equipment and other machinery and equipment
0.167
0.220
13.7
10.4

mean, all assets
0.218
0.297
11.5
8.2

Statement: the average assessed ex ante expected service life estimates are 8.2 years.
Question: how many years are the average assessed ex ante expected service life estimates?
Answer: [8.2]