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Jan Koopstra
| Last name | Koopstra |
| First name | Jan |
| Gender | Male |
| Birthdate | 11.1959 |
| Country | NED |
| 500m | 45,62 (Heerenveen, 22.03.2005) |
| 1.000m | 1.33,38 (Heerenveen, 24.01.2006) |
| 1.500m | 2.20,12 (Heerenveen, 27.11.2003) |
| 3.000m | 4.59,54 (Heerenveen, 24.01.2006) |
| 5.000m | 8.29,49 (Heerenveen, 16.02.2004) |
| 10.000m | 17.33,35 (Heerenveen, 23.03.2004) |
| Big Combo | 195,942 |
| Sprint | 92,310 |
| Small Combo | 193,198 |
| Mini Combo | 188,939 |
| Tiny Combo | 139,016 |
| Latest update in | 2006 |
NED