Monthly NTA archive 2019 December 31 December 2019 November 30 November 2019 October 31 October 2019 September 30 September 2019 August 31 August 2019 July 31 July 2019 June 30 June 2019 May 31 May 2019 April 30 April 2019 March 31 March 2019 February 28 February 2019 January 31 January 2019 2018 December 31 December 2018 November 30 November 2018 October 31 October 2018 September 30 September 2018 August 31 August 2018 July 31 July 2018 June 30 June 2018 May 31 May 2018 April 30 April 2018 March 31 March 2018 February 28 February 2018 January 31 January 2018 2017 December 31 December 2017 November 30 November 2017 October 31 October 2017 September 30 September 2017 August 31 August 2017 July 31 July 2017 June 30 June 2017 May 31 May 2017 April 30 April 2017 March 31 March 2017 February 28 February 2017 January 31 January 2017 2016 December 31 December 2016 November 30 November 2016 October 31 October 2016 September 30 September 2016 August 31 August 2016 July 31 July 2016 June 30 June 2016 May 31 May 2016 April 30 April 2016 March 31 March 2016 February 29 February 2016 January 31 January 2016 2015 December 31 December 2015 November 30 November 2015 October 31 October 2015 September 30 September 2015 August 31 August 2015 July 31 July 2015 June 30 June 2015 May 31 May 2015 April 30 April 2015 March 31 March 2015 February 28 February 2015 January 31 January 2015 2014 December 31 December 2014 November 30 November 2014 October 31 October 2014 September 30 September 2014 August 31 August 2014 July 31 July 2014 June 30 June 2014 May 31 May 2014 April 30 April 2014 March 31 March 2014 February 28 February 2014 January 31 January 2014 2013 December 31 December 2013 November 30 November 2013 October 31 October 2013 September 30 September 2013 August 31 August 2013 July 31 July 2013 June 30 June 2013 May 31 May 2013 April 30 April 2013 March 31 March 2013 February 28 February 2013 January 31 January 2013 2012 December 31 December 2012 November 30 November 2012 October 31 October 2012 September 30 September 2012 August 31 August 2012 July 31 July 2012 June 30 June 2012 May 31 May 2012 April 30 April 2012 March 31 March 2012 February 29 February 2012 January 31 January 2012 2011 December 31 December 2011 November 30 November 2011 October 31 October 2011 September 30 September 2011 August 31 August 2011 July 31 July 2011 June 30 June 2011 May 31 May 2011 April 30 April 2011 March 31 March 2011 February 28 February 2011 January 31 January 2011
