Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Total | Serbs | Hungarians | Germans | Romanians | Slovaks |
| --- | --- | --- | --- | --- | --- | --- |
| 1910 | 566,400 | 229,568 (40.5%) | 108,622 (19.2%) | 125,374 (22.1%) | 73,303 (12.9%) | 16,223 (2,9%) |
| 1921 | 559,096 | 235,148 (42.1%) | 98,463 (17.6%) | 126,519 (22.6%) | 66,433 (11,9%) | 17,595 (3,2%) |
| 1931 | 585,579 | 261,123 (44,6%) | 95,867 (16,4%) | 120,541 (20,6%) | 62,365 (10,7%) | 17,900 (2,1%) |
| 1948 | 601,626 | 358,067 (59,6%) | 110,446 (18,4%) | 17,522 (2,9%) | 55,678 (9,3%) | 20,685 (2,4%) |
| 1953 | 617,163 | 374,258 (60,6%) | 112,683 (18,4%) | n/a | 55,094 (8,9%) | 21,299 (3,4%) |
| 1961 | 655,868 | 423,837 (64,6%) | 111,944 (17,1%) | n/a | 54,447 (8,3%) | 22,306 (3,4%) |
| 1971 | 666,559 | 434,810 (65,2%) | 103,090 (15.5%) | n/a | 49,455 (7,4%) | 22,173 (3,3%) |
| 1981 | 672,884 | 424,765 (65,7%) | 90,445 (14,0%) | n/a | 43,474 (6,7%) | 21,392 (3,3%) |
| 1991 | 648,390 | 423,475 (65,1%) | 76,153 (11.7%) | n/a | 35,935 (5,5%) | 19,903 (3.1%) |
| 2002 | 665,397 | 477,890 (71.8%) | 63,047 (9.5%) | 908 (0,1%) | 27,661 (4,1%) | 17,994 (2,7%) |
Question:
what was the last year that romanians were 5,5%?
Answer:
1991