Follow-up to the Washington State Anniversary

I had the question from  jeadie05   "how many states at the time Washington became a state?"  Here's a list of states and their order and date of admission...

1. Delaware 7 December 1787    2. Pennsylvania 12 December 1787    3. New Jersey 18 December 1787    4. Georgia 2 January 1788    5. Connecticut 9 January 1788    6. Massachusetts 6 February 1788    7. Maryland 28 April 1788   8. South Carolina 23 May 1788    9. New Hampshire 21 June 1788    10. Virginia 25 June 1788     11. New York 26 July 1788             12. North Carolina 21 November 1789    13. Rhode Island 29 May 1790    14. Vermont 4 March 1791    15. Kentucky 1 June 1792    16. Tennessee 1 June 1796       17. Ohio 1 March 1803            18. Louisiana 30 April 1812    19. Indiana 11 December 1816     20. Mississippi 10 December 1817     21. Illinois 3 December 1818     22. Alabama 14 December 1819     23. Maine 15 March 1820    24. Missouri 10 August 1821    25. Arkansas 15 June 1836     26. Michigan 26 January 1837     27. Florida 3 March 1845     28. Texas 19 December 1845    29. Iowa 28 December 1846       30. Wisconsin 29 May 1848         31. California 9 September 1850      32. Minnesota 11 May 1858    33. Oregon 14 February 1859      34. Kansas 29 January 1861     35. West Virginia 20 June 1863     36. Nevada 31 October 1864            37. Nebraska 1 March 1867       38. Colorado 1 August 1876   39. North Dakota 2 November 1889        40. South Dakota 2 November 1889      41. Montana 8 November 1889                 42. Washington 11 November 1889      43. Idaho 3 July 1890    44. Wyoming 10 July 1890       45. Utah 4 January 1896          46. Oklahoma 16 November 1907        47. New Mexico 6 January 1912        48. Arizona 14 February 1912     49. Alaska 3 January 1959  and   50. Hawaii 21 August 1959