Table:
text: Banat
Demographics
Serbian Banat
Year_ Total Serbs Hungarians Germans Romanians Slovaks_
1910 566400 229,568 (40.5%) 108,622 (19.2%) 125,374 (22.1%) 73,303 (12.9%) 16,223 (2,9%)
1921 559096 235,148 (42.1%) 98,463 (17.6%) 126,519 (22.6%) 66,433 (11,9%) 17,595 (3,2%)
1931 585579 261,123 (44,6%) 95,867 (16,4%) 120,541 (20,6%) 62,365 (10,7%) 17,900 (2,1%)
1948 601626 358,067 (59,6%) 110,446 (18,4%) 17,522 (2,9%) 55,678 (9,3%) 20,685 (2,4%)
1953 617163 374,258 (60,6%) 112,683 (18,4%) n/a 55,094 (8,9%) 21,299 (3,4%)
1961 655868 423,837 (64,6%) 111,944 (17,1%) n/a 54,447 (8,3%) 22,306 (3,4%)
1971 666559 434,810 (65,2%) 103,090 (15.5%) n/a 49,455 (7,4%) 22,173 (3,3%)
1981 672884 424,765 (65,7%) 90,445 (14,0%) n/a 43,474 (6,7%) 21,392 (3,3%)

text: Banat
Demographics
Serbian Banat
Year_ Total Serbs Hungarians Germans Romanians Slovaks_
1991 648390 423,475 (65,1%) 76,153 (11.7%) n/a 35,935 (5,5%) 19,903 (3.1%)
2002 665397 477,890 (71.8%) 63,047 (9.5%) 908 (0,1%) 27,661 (4,1%) 17,994 (2,7%)

Question: In which years was there at least 600,000 in the Banat?