Query: In fact, the trend, while not statistically significant, is downward.”

Relevant passages:
Solar cycle <=SEP=> The solar cycle or solar magnetic activity cycle is the nearly periodic 11-year change in the Sun 's activity ( including changes in the levels of solar radiation and ejection of solar material ) and appearance ( changes in the number and size of sunspots , flares , and other manifestations ) .   They have been observed ( by changes in the sun 's appearance and by changes seen on Earth , such as auroras ) for centuries .   The changes on the sun cause effects in space , in the atmosphere , and on Earth 's surface . While it is the dominant variable in solar activity , aperiodic fluctuations also occur .

Uptick rule <=SEP=> The uptick rule is a trading restriction that states that short selling a stock is only allowed on an uptick . For the rule to be satisfied , the short must be either at a price above the last traded price of the security , or at the last traded price when the most recent movement between traded prices was upward ( i.e. the security has traded below the last-traded price more recently than above that price ) .   The U.S. Securities and Exchange Commission ( SEC ) defined the rule , and summarized it :  `` Rule 10a-1 ( a ) ( 1 ) provided that , subject to certain exceptions , a listed security may be sold short ( A ) at a price above the price at which the immediately preceding sale was effected ( plus tick ) , or ( B ) at the last sale price if it is higher than the last different price ( zero-plus tick ) . Short sales were not permitted on minus ticks or zero-minus ticks , subject to narrow exceptions . ''   The rule went into effect in 1938 and was removed when Rule 201 Regulation SHO became effective in 2007 . In 2009 , the reintroduction of the uptick rule was widely debated , and proposals for a form of its reintroduction by the SEC went into a public comment period on 2009-04-08 . A modified form of the rule was adopted on 2010-02-24 .

Hysterectomy <=SEP=> Hysterectomy ( from Greek ὑστέρα , hystera , `` uterus '' + ἐκτομή , ektomḗ , `` a cutting out of '' ) is the surgical removal of the uterus . It may also involve removal of the cervix , ovaries , fallopian tubes and other surrounding structures .   Usually performed by a gynecologist , hysterectomy may be total ( removing the body , fundus , and cervix of the uterus ; often called `` complete '' ) or partial ( removal of the uterine body while leaving the cervix intact ; also called `` supracervical '' ) . It is the most commonly performed gynecological surgical procedure . In 2003 , over 600,000 hysterectomies were performed in the United States alone , of which over 90 % were performed for benign conditions . Such rates being highest in the industrialized world has led to the major controversy that hysterectomies are being largely performed for unwarranted and unnecessary reasons .   Removal of the uterus renders the patient unable to bear children ( as does removal of ovaries and fallopian tubes ) and has surgical risks as well as long-term effects , so the surgery is normally recommended when other treatment options are not available or have failed . It is expected that the frequency of hysterectomies for non-malignant indications will fall as there are good alternatives in many cases .   Oophorectomy ( removal of ovaries ) is frequently done together with hysterectomy to decrease the risk of ovarian cancer . However , recent studies have shown that prophylactic oophorectomy without an urgent medical indication decreases a woman 's long-term survival rates substantially and has other serious adverse effects . This effect is not limited to pre-menopausal women ; even women who have already entered menopause were shown to have experienced a decrease in long-term survivability post-oophorectomy .

Usage share of operating systems <=SEP=> The usage share of operating systems is the percentage of the operating systems used in computing devices ( approximately market share , also discussed in the article ) .   There are `` three big personal computing platforms '' , two of which claim over 1.4 billion users , Android and Windows . The third `` platform '' or strictly two ( or three ) platformsApple 's iOS and macOS combined , have over 1 billion users . Historically Windows running on desktop computers was dominant ( Macintosh computers were previously the more popular desktop computers , and those followed the mainframe computer-era ) , for a 25 year period from the early 1990s to 2016 . From late 2016 the mobile era took over , with the desktop computers ' market share ( measured by web usage ; including macOS ) was down to 45.22 % in January 2017 , an `` end of an era '' was declared by StatCounter for Windows ( and the desktop in general ) as no longer most popular , since smartphones alone , ( excluding tablets ) , because of Android , have majority use globally .   Different categories of computers use a wide variety of operating systems ( OS ) . Windows gained majority usage share in the 1990s , on desktops ( the computer platform then taking over ) , eventually described as `` dominant '' ( and still has a majority as a `` desktop OS '' ) but is not dominant across all platforms ( while latest version runs on all platforms ) . On smartphones , Android is dominant by any metric ; its installed base is 1.8 billion , which tops Windows on PCs . No operating system has a clear majority across all platforms or all regions ; as judged by web usea proxy for all useAndroid has surpassed Windows , when counted across all platforms and regions . Android is the highest ranked OS in most countries of the world ( even a few in Europe , such as Poland with majority use ) ; leading to it ( with some help from other mobile operating systems such as Apple 's ) eventually , in late 2016 , making the world smartphone-majority . Android alone explains that to a large degree , smartphones alone have majority use , where Android is dominant . Android has over half the usage share across platforms ( even with it not used much on desktops ) in the two biggest continents ( and most populous with 76 % combined ) , Africa and Asia . For brief periods , countries on other continents , such as the United States , have lost desktops-majority share ; that has also happened for South America .   Since 2013 , devices running Android have been selling more than Windows , iOS and macOS devices combined . That made Android the most popular operating system that runs on smartphones , while iOS is more used on tablets . Most desktop and laptop computers use Microsoft Windows , while virtually all supercomputers ( and for over a decade back ) use Linux . In the servers category , there is more diversity , with Linux and Windows Server most popular , and many fewer mainframes . Data about operating system share is difficult to obtain , since in most categories there are few reliable primary sources or agreed methodologies for its collection .