what is the first year entered service year?
1983
col : locomotive | named | serial no | entered service | gauge | livery row 1 : bl26 | bob hawke | 83-1010 | march 1983 | standard | pacific national blue & yellow row 2 : bl27 |  | 83-1011 | august 1983 | standard | pacific national blue & yellow row 3 : bl28 |  | 83-1012 | september 1983 | standard | pacific national blue & yellow row 4 : bl29 |  | 83-1013 | october 1983 | broad | pacific national blue & yellow row 5 : bl30 |  | 83-1014 | december 1983 | standard | pacific national blue & yellow row 6 : bl31 |  | 83-1015 | november 1983 | standard | pacific national blue & yellow row 7 : bl32 |  | 83-1016 | february 1984 | broad | national rail orange & grey row 8 : bl33 |  | 83-1017 | april 1984 | standard | pacific national blue & yellow row 9 : bl34 |  | 83-1018 | june 1984 | broad | pacific national blue & yellow row 10 : bl35 |  | 83-1019 | july 1984 | standard | pacific national blue & yellow
what is the first year entered service year?
Locomotive Named Serial No Entered service Gauge Livery
BL26 Bob Hawke 83-1010 March 1983 Standard Pacific National blue & yellow
BL27 83-1011 August 1983 Standard Pacific National blue & yellow
BL28 83-1012 September 1983 Standard Pacific National blue & yellow
BL29 83-1013 October 1983 Broad Pacific National blue & yellow
BL30 83-1014 December 1983 Standard Pacific National blue & yellow
BL31 83-1015 November 1983 Standard Pacific National blue & yellow
BL32 83-1016 February 1984 Broad National Rail orange & grey
BL33 83-1017 April 1984 Standard Pacific National blue & yellow
BL34 83-1018 June 1984 Broad Pacific National blue & yellow
BL35 83-1019 July 1984 Standard Pacific National blue & yellow
1983