Table:
text: List of United States women's national ice hockey team rosters
Winter Olympics
2010 Winter Olympics
Position_ Name_ Height Weight Birthdate Birthplace _2009_10_team_
G Brianne McLaughlin 174 cm (5 ft 9 in) 59 kg (130 lb) June 20, 1987 Sheffield, Ohio Robert Morris Colonials
G Molly Schaus 174 cm (5 ft 9 in) 67 kg (148 lb) July 29, 1988 Natick, Massachusetts Boston Eagles
G Jessie Vetter 174 cm (5 ft 9 in) 77 kg (170 lb) December 19, 1985 Cottage Grove, Wisconsin Wisconsin Badgers
D Kacey Bellamy 174 cm (5 ft 9 in) 65 kg (143 lb) April 22, 1987 Westfield, Massachusetts New Hampshire Wildcats

text: List of United States women's national ice hockey team rosters
Winter Olympics
2010 Winter Olympics
Position_ Name_ Height Weight Birthdate Birthplace _2009_10_team_
D Caitlin Cahow 163 cm (5 ft 4 in) 71 kg (157 lb) May 20, 1985 New Haven, Connecticut Harvard Crimson
D Lisa Chesson 169 cm (5 ft 7 in) 69 kg (152 lb) August 18, 1986 Plainfield, Illinois Ohio State Buckeyes
D Molly Engstrom 175 cm (5 ft 9 in) 81 kg (179 lb) March 1, 1983 Siren, Wisconsin Wisconsin Badgers
D Angela Ruggiero – A 175 cm (5 ft 9 in) 87 kg (192 lb) January 3, 1980 Los Angeles, California Harvard Crimson
D Kerry Weiland 163 cm (5 ft 4 in) 64 kg (141 lb) October 18, 1980 Palmer, Alaska Wisconsin Badgers

text: List of United States women's national ice hockey team rosters
Winter Olympics
2010 Winter Olympics
Position_ Name_ Height Weight Birthdate Birthplace _2009_10_team_
F Julie Chu – A 174 cm (5 ft 9 in) 67 kg (148 lb) March 13, 1982 Bridgeport, Connecticut Harvard Crimson
F Natalie Darwitz – C 160 cm (5 ft 3 in) 62 kg (137 lb) October 13, 1983 Eagan, Minnesota Minnesota Golden Gophers
F Meghan Duggan 175 cm (5 ft 9 in) 74 kg (163 lb) September 3, 1987 Danvers, Massachusetts Wisconsin Badgers
F Hilary Knight 178 cm (5 ft 10 in) 78 kg (172 lb) July 12, 1989 Hanover, New Hampshire Wisconsin Badgers
F Jocelyne Lamoureux 168 cm (5 ft 6 in) 70 kg (150 lb) July 3, 1989 Grand Forks, North Dakota North Dakota Fighting Sioux

text: List of United States women's national ice hockey team rosters
Winter Olympics
2010 Winter Olympics
Position_ Name_ Height Weight Birthdate Birthplace _2009_10_team_
F Monique Lamoureux 168 cm (5 ft 6 in) 71 kg (157 lb) July 3, 1989 Grand Forks, North Dakota North Dakota Fighting Sioux
F Erika Lawler 152 cm (5 ft 0 in) 59 kg (130 lb) February 5, 1987 Fitchburg, Massachusetts Wisconsin Badgers
F Gisele Marvin 174 cm (5 ft 9 in) 75 kg (165 lb) March 7, 1987 Warroad, Minnesota Minnesota Golden Gophers
F Jenny Potter – A 163 cm (5 ft 4 in) 66 kg (146 lb) January 12, 1979 Edina, Minnesota Minnesota Golden Gophers
F Kelli Stack 165 cm (5 ft 5 in) 59 kg (130 lb) January 13, 1988 Brooklyn Heights, Ohio Boston Eagles

text: List of United States women's national ice hockey team rosters
Winter Olympics
2010 Winter Olympics
Position_ Name_ Height Weight Birthdate Birthplace _2009_10_team_
F Karen Thatcher 174 cm (5 ft 9 in) 74 kg (163 lb) February 29, 1984 Blaine, Washington Providence Friars
F Jinelle Zaugg-Siergiej 183 cm (6 ft 0 in) 82 kg (181 lb) March 27, 1986 Eagle River, Wisconsin Wisconsin Badgers

Question: How many birthdays does the list of US women's national ice hockey teams have in total?

Question: How many total names are included in the US women's national ice hockey team list?

Question: Which position was most prominent on the US women's national ice hockey team rosters?